From rest at 2 m/s² a car travels 25 m in the first 5 s, and a ball thrown up at 20 m/s reaches about 20 m, so this IB sheet opens with the two textbook motion results. Momentum pairs are recorded as equal and opposite, and displacement is named as a vector.
Key Takeaways
From rest at 2 m/s² a car covers 25 m in 5 s (Q1).
A 20 m/s vertical throw reaches about 20 m (Q2).
Q4 records forces in a pair as equal and opposite.
Section A: Multiple Choice Questions (1 Mark Each)
Choose the correct option for each question.
1.A car accelerates from rest at 2 m/s². The distance it travels in the first 5 s is
(a) 10 m(b) 25 m(c) 50 m(d) 100 m
2.A ball is thrown vertically upward with a speed of 20 m/s. The maximum height reached is approximately
(a) 10 m(b) 20 m(c) 40 m(d) 200 m
3.The gradient of a velocity-time graph represents the
(a) displacement(b) acceleration(c) average speed(d) force
4.According to Newton's third law, the action and reaction forces are
(a) equal and in the same direction(b) equal and opposite(c) unequal but opposite(d) applied to the same body
5.The weight of a 5.0 kg mass on the surface of the Earth is
(a) 5.0 N(b) 9.8 N(c) 49 N(d) 98 N
6.Which of the following is a vector quantity?
(a) speed(b) distance(c) displacement(d) time
Section B: Short Answer Type Questions (2 Marks Each)
Show all steps clearly.
7.State the difference between distance and displacement.
8.Describe the shape of a displacement-time graph for an object moving with constant velocity.
9.State Newton's first law of motion.
10.Explain why the normal reaction on a box resting on a table is not a Newton's third law pair with the weight of the box.
11.A car brakes uniformly from 30 m/s and stops after 75 m. State the value of its average speed during braking.
12.State what is meant by the term terminal velocity.
13.State the equation that links the net force acting on an object, its mass and its acceleration.
14.Define momentum and state its SI unit.
Section C: Numericals & Word Problems (3 Marks Each)
Apply the concepts to solve the problems. Show all working.
15.A car increases its velocity from 12 m/s with a constant acceleration of 2 m/s². Using v = u + at, determine the velocity after 5 s.
16.A train accelerates uniformly from rest at 2 m/s². Using s = ½at², calculate the distance it travels in 10 s.
17.A car travelling at 20 m/s comes to rest in a distance of 40 m. Using a = v² ÷ 2s, calculate the deceleration.
18.A net force of 30 N acts on a mass of 6 kg. Using F = ma, calculate the acceleration.
19.A ball is kicked horizontally from the edge of a cliff and lands after 2.0 s. Using s = ½gt² with g = 9.8 m/s², calculate the height of the cliff.
20.A box of mass 10 kg is pulled across a floor with a horizontal force of 30 N while friction is 10 N. Using a = (F − f) ÷ m, calculate the acceleration.
Answer Key
1. b) 25 m
2. b) 20 m
3. b) acceleration
4. b) equal and opposite
5. c) 49 N
6. c) displacement
7. Refer to solution guide.
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20. Refer to solution guide.
End of Worksheet
People Also Ask
How far does a car travel from rest at 2 m/s² in 5 s?
25 m, option (b) in this worksheet (Q1).
How high does a ball thrown up at 20 m/s go?
About 20 m, option (b) in this worksheet (Q2).
What are the forces in an action-reaction pair?
Equal and opposite, option (b) in this worksheet (Q4).
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