Physics Practice Questions

• Chapter – Motion In a Straight Line

1. From the top of a tower two stones, whose masses are in the ratio 1: 2 are thrown one straight up with an initial speed u and the second straight down with the same speed u. Then, neglecting air resistance:

(a) The heavier stone hits the ground with a higher speed

(b) The lighter stone hits the ground with a higher speed

(c) Both the stones will have the same speed when they hit the ground

(d) The speed can’t be determined with the given data

2. A body is travelling in a straight line with a uniformly increasing speed. Which one of the plot represents the change in distance (s) travelled with time (t)?(Yahan aapko graphs ki images ya description dalni hogi)

(a) Linear graph

(b) Parabolic graph (opening upwards)

(c) Horizontal line

(d) Decreasing slope graph

3. A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is:

(a) Equal to the time of fall

(b) Less than the time of fall

(c) Greater than the time of fall

(d) Twice the time of fall

4. A body of 5 kg is moving with a velocity of 20 m/s. If a force of 100N is applied on it for 10s in the same direction as its velocity, what will now be the velocity of the body?

(a) 200 m/s

(b) 220 m/s

(c) 240 m/s

(d) 260 m/s

 5. A particle when thrown, moves such that it passes from same height at 2s and 10s. The height is:

(a) g

(b) 2g

(c) 5g

(d) 10g

6. Two trains one of 100 m and another of length 125m, are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. If their acceleration are 0.3m/s² and 0.2m/s² respectively, then the time taken to pass each other will be:

(a) 5 s

(b) 10 s

(c) 15 s

(d) 20 s

7. A ball is dropped downwards. After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds?

(a) 25 m

(b) 20 m

(c) 50 m

(d) 9.8 m

8. A balloon rises from rest with a constant acceleration g/8. A stone is released from it when it has risen to height h. The time taken by the stone to reach the ground is:a) 4\sqrt{\frac{h}{g}}b) 2\sqrt{\frac{h}{g}}c) \sqrt{\frac{2h}{g}}d) \sqrt{\frac{g}{h}}