IGCSE Physics (0625) Paper 2 -Unit 1. General physics-1.5.1 Effects of forces

Question

 A car has a mass of 1500 kg. A constant resultant force acts on the car and the car accelerates from 15 m / s to 20 m / s in 4.0 seconds.
What is the magnitude of the resultant force acting on the car?

A 300 N               B 1200 N                C 1900 N                D 7500 N

Answer/Explanation

Ans:

C

Question

 A car is travelling around a circular track at a constant speed, as shown.
In which direction is the resultant force on the car?

Answer/Explanation

Ans:B

Question

An object of mass 0.80 kg is moving in a straight line at a velocity of 2.0 m / s. A force is exerted on the object, in the direction of motion, for a period of 1.0 minute and the velocity of the object increases to 6.0 m /s.
What force is exerted on the object?
A 0.053 N

B 0.080 N

C 3.2 N

D 4.8 N

Answer/Explanation

Ans: A

Question

An object moves at constant speed in the circular path shown.

 

Which statement about the acceleration of the object when it is at point P is correct?
A The acceleration is in the direction of arrow X.
B The acceleration is in the direction of arrow Y.
C The acceleration is in the direction of arrow Z.
D The object is not accelerating.

Answer/Explanation

Ans: C

Question

A satellite orbits the Earth in an anticlockwise direction at constant speed, as shown.

When the satellite is in the position shown, in which direction does the resultant force act upon it?

                                                                                   

Answer/Explanation

Ans: D

Question

The diagram shows a bird in flight. The bird is flying in a horizontal direction to the right. 

In which direction does air resistance act on the bird?

                               

Answer/Explanation

Ans: D

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