Check what I know: Projectile Motion · H1 Physics 8867

Check what you know about H1 Physics Projectile Motion, practise what needs work, then try fresh auto-marked progress checks and return for a later review.

GCE A-Level H1 Physics 2027

Learning goals

Work through the questions and use the feedback to plan revision.

This check is a formative starting point for the topic. Complete the questions, then use the feedback to choose the practice and repair work that follows.

Selected responses on this page do not establish H1 Physics mastery. Use your written problem solving as the stronger evidence of what you can do independently.

Check what I know

Check what I know: Projectile Motion · H1 Physics 8867

A text-complete selected-response activity with quantities, units, directions, conditions, choices and feedback stated explicitly.

About 8 minutes

Check what I know

Answer 3 short questions. This starting check helps choose what to work on; it does not prove mastery.

Recent attempts

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This check needs JavaScript to record answers. The reviewed questions are listed below for study.

A projectile moves through a uniform gravitational field with negligible air resistance. What happens to its perpendicular velocity components?

The horizontal component remains constant and the vertical component changes at the constant gravitational acceleration.
Both components remain constant because the projectile has no contact force.
Both components decrease at acceleration g.
The horizontal component decreases while the vertical component remains constant.

An object moves along a sloping path in an approximately uniform gravitational field. What determines its gravitational potential-energy change?

Its mass, field strength and total path length: ΔEp = mgL.
Its mass, field strength and signed vertical height change: ΔEp = mgΔh.
Its mass and speed only, regardless of the height change.
Its mass and absolute final height, without any initial reference.

A falling body has reached terminal speed. Neglect buoyancy. Which force and energy account is correct?

Drag and weight both vanish, so energy transfer stops.
Drag exceeds weight and kinetic energy keeps increasing.
Drag balances weight; kinetic energy stays constant while drag continues to dissipate gravitational potential energy.
Weight balances drag, so gravitational potential energy remains constant.

Practise

Practise: Projectile Motion · H1 Physics 8867

A text-complete selected-response activity with quantities, units, directions, conditions, choices and feedback stated explicitly.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

A ball leaves a cliff horizontally at 12 m s⁻¹ and lands 1.5 s later. Neglect air resistance and take g = 9.81 m s⁻². What are horizontal displacement and final vertical velocity?

18 m and zero vertical velocity
27 m and 9.81 m s⁻¹ downward
18 m and 14.7 m s⁻¹ downward
8.0 m and 14.7 m s⁻¹ upward

An astronaut of mass 70 kg stands on the Moon, where the gravitational field strength is 1.6 N kg⁻¹. What are the astronaut's mass and weight there?

Mass 70 kg; weight 110 N
Mass 70 kg; weight 70 N
Mass 11 kg; weight 110 N
Mass 70 kg; weight 690 N

Astronauts in a spacecraft orbiting 400 km above the Earth float freely in the cabin. Which statement about their weight is correct?

Their weight is zero because they are outside the Earth's gravitational field.
Their weight still acts; they float because they and the cabin fall freely together.
Their weight is balanced by an outward centrifugal force, so the resultant is zero.
Their mass becomes zero, so their weight is zero.

A 0.40 kg ball moves from a platform to a point 0.30 m below its launch level. Take g = 9.81 N kg⁻¹. What is ΔEp?

+1.18 J
−1.18 J
0 J
+4.71 J

Which reasoning derives ΔEp = mgΔh for a mass m raised through a height Δh near the Earth's surface?

Raising the mass at constant speed needs an upward force mg through a vertical displacement Δh, so the work done, mgΔh, is stored as gravitational potential energy.
A falling mass reaches v² = 2gΔh, so ½mv² = mgΔh is the potential energy.
The force mg acts along the whole path length travelled, so the work done is mg multiplied by the path length.
Gravitational field strength is energy per unit mass per unit height, so ΔEp = mgΔh by definition.

A sphere falls from rest in still air, with drag increasing with speed. Neglect buoyancy and treat g as constant. As it approaches terminal speed, which sequence is correct?

Drag rises while downward resultant and acceleration fall; at terminal speed kinetic energy is constant but energy dissipation through drag continues.
Weight rises until it equals constant drag, after which both forces vanish.
Drag falls as speed rises, so downward acceleration grows beyond g.
At terminal speed the body stops and energy transfer ceases.

Practise

Practise after feedback: Projectile Motion · H1 Physics 8867

A text-complete selected-response activity with quantities, units, directions, conditions, choices and feedback stated explicitly.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

A projectile is launched at 20 m s⁻¹ at 30° above the horizontal and returns to its launch height. Neglect air resistance and take g = 10 m s⁻². What is its time of flight?

4.0 s
1.0 s
3.46 s
2.0 s

A ball leaves a cliff horizontally at 15 m s⁻¹ and lands 1.2 s later. Neglect air resistance and take g = 9.81 m s⁻². What are horizontal displacement and final vertical velocity?

12.5 m and 11.8 m s⁻¹ upward
18 m and zero vertical velocity
18 m and 11.8 m s⁻¹ downward
15 m and 9.81 m s⁻¹ downward

An astronaut of mass 70 kg stands on the Moon, where the gravitational field strength is 1.6 N kg⁻¹. What are the astronaut's mass and weight there?

Mass 70 kg; weight 110 N
Mass 70 kg; weight 70 N
Mass 11 kg; weight 110 N
Mass 70 kg; weight 690 N

Astronauts in a spacecraft orbiting 400 km above the Earth float freely in the cabin. Which statement about their weight is correct?

Their weight is zero because they are outside the Earth's gravitational field.
Their weight still acts; they float because they and the cabin fall freely together.
Their weight is balanced by an outward centrifugal force, so the resultant is zero.
Their mass becomes zero, so their weight is zero.

A 0.50 kg ball moves to a point 0.40 m below its launch level. Take g = 9.81 m s⁻². What is ΔEp?

+1.96 J
−1.96 J
−4.91 J
0 J

A 1.5 kg object is carried up a 5.0 m ramp that gains 2.0 m vertically. Take g = 9.81 m s⁻². What is ΔEp?

+73.6 J
0 J
+29.4 J
−29.4 J

Which reasoning derives ΔEp = mgΔh for a mass m raised through a height Δh near the Earth's surface?

Raising the mass at constant speed needs an upward force mg through a vertical displacement Δh, so the work done, mgΔh, is stored as gravitational potential energy.
A falling mass reaches v² = 2gΔh, so ½mv² = mgΔh is the potential energy.
The force mg acts along the whole path length travelled, so the work done is mg multiplied by the path length.
Gravitational field strength is energy per unit mass per unit height, so ΔEp = mgΔh by definition.

A sphere is falling at terminal speed in still air. Neglect buoyancy. Which force and energy account is correct?

Drag balances weight and kinetic energy stays constant while drag dissipates gravitational potential energy.
All forces vanish and energy transfer stops.
Drag exceeds weight while kinetic energy increases.
Drag balances weight and gravitational potential energy stops decreasing.

A raindrop accelerates downward below terminal speed in still air. Its drag increases with speed; neglect buoyancy and changes in mass. Which change occurs as its speed increases?

Weight increases until it matches a constant drag force.
Drag increases, so downward resultant and acceleration decrease while kinetic energy still rises.
Acceleration stays at g because a moving body cannot experience drag.
Kinetic energy decreases whenever drag increases, even though falling speed rises.

Check my progress

Check my progress: Projectile Motion · H1 Physics 8867

A text-complete selected-response activity with quantities, units, directions, conditions, choices and feedback stated explicitly.

About 10 minutes

Check my progress

Answer 3 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Check again

Check again: Projectile Motion · H1 Physics 8867

A text-complete selected-response activity with quantities, units, directions, conditions, choices and feedback stated explicitly.

About 10 minutes

Check again

Answer 3 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Review

Review: Projectile Motion · H1 Physics 8867

A text-complete selected-response activity with quantities, units, directions, conditions, choices and feedback stated explicitly.

About 10 minutes

Review

Answer 3 questions. A scheduled review can contribute to your course progress only when it is due and the result is accepted.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Course and syllabus information

Course: GCE A-Level H1 Physics
Edition: GCE A-Level H1 Physics 2027

Check what I know: Projectile Motion · H1 Physics 8867

Check what I know: Projectile Motion · H1 Physics 8867

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Practise: Projectile Motion · H1 Physics 8867

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Practise after feedback: Projectile Motion · H1 Physics 8867

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Check my progress: Projectile Motion · H1 Physics 8867

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Check again: Projectile Motion · H1 Physics 8867

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Review: Projectile Motion · H1 Physics 8867

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