This document includes MCQs from 5054 past papers that have been compiled into a topical collection of questions regarding the topic Forces/ Dynamics. It proved extremely useful to me by giving me an idea as to what could be expected from paper 1 MCQ questions from the topic of forces/dynamics.
1) A man pulls a sledge of mass 25 kg across level ground with a horizontal force
of 60N. A constant force of friction of 20 N acts on the sledge.
What is the acceleration of the sledge?
A 0.63 m / s2 B 1.6 m / s2 C 2.4 m / s2 D 3.2 m / s2
2) A car moves in a circle at constant speed.
What is the direction of the resultant force acting on the car?
3) Four forces act at a point as shown.
What is the size of the resultant force?
A 0N B 4N C 6N D 8N
4) When a car turns a corner at speed, it risks toppling over. Two factors affecting the
stability of acar are the height of its centre of mass and the distance between its front
wheels.
Which factors make the car most stable?
1
,DYNAMICS
5) A metal ball of mass 0.30 kg and weight 3.0 N is held so that it is below the
surface of oil. It experiences an upwards force of 0.30 N.
When the ball is released, what is its initial acceleration?
A 1.0 m / s2 B 9.0 m / s2 C 10 m / s2 D 11 m / s2
6) The Earth travels in a circular orbit around the Sun at constant speed.
Which arrows show the direction of the acceleration of the Earth and the direction of the
velocity of the Earth?
7) Which object has the largest resultant force?
2
, DYNAMICS
8) In which example does friction act in the direction of forward motion of the object
on which itacts?
A on a suitcase accelerating on a conveyor belt
B on sandpaper rubbing a wooden block
C on the skis of a skier accelerating downhill on smooth snow
D on the tyres of a braking car
9) The diagram represents the Moon in its orbit around the Earth.
Which arrow represents the direction of the resultant force acting on the Moon at the instant
shown?
10) An apple of mass 0.15 kg and weight 1.5 N falls from a tree. At one point during its fall,
the airresistance on the apple is 0.60 N upwards.
What is the acceleration of the apple at this point?
A 4.0 m / s2 B 6.0 m / s2 C 10 m / s2 D 14 m / s2
11) Four of the gravitational forces that act between bodies in the Solar System are described below.
P the force on the Moon due to the Earth
Q the force on the Earth due to the Sun
R the force on the Earth due to the Moon
S the force on the Moon due to the Sun
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