CLASS IX PHYSICS
MOTION
NUMERICALS FOR PRACTICE
1. A particle is moving up an inclined plane. Its velocity changes from 25m/s to 10m/s
in 5 seconds. What is its acceleration?
2. The velocity changes from 35m/s to 60m/s in 3 seconds. What is its acceleration?
3. A body covered a distance of 4 metre along a semicircular path. Calculate the
magnitude of displacement of the body, and the ratio of distance to displacement?
4. A particle moving with an initial velocity of 8m/s is subjected to a uniform
acceleration of 2.5m/s2. Find the displacement in the next 4 sec.
5. A train is travelling at a speed of 40 km/ h. Brakes are applied so as to produce a
uniform acceleration of −0.5 m /s2. Find how far the train will go before it is brought
to rest.
6. A Truck covers 90km at a uniform speed of 30km/hr. what should be its speed for
the next 120km if the average speed for the entire journey is 60km/h?
7. A stone is thrown in a vertically upward direction with a velocity of 15 m/s. If the
acceleration of the stone during its motion is 8m /s2 in the downward direction,
what will be the height attained by the stone and how much time will it take to reach
there?
8. A person goes to market, makes purchases and comes back at a
constant slower speed. Draw displacement- time and velocity time graphs of the
person?
9. Rahul runs for 8 min. at a uniform speed 5 km/h. At what speed should he run for
the next 10 min. so that the average speed comes 15km/hr?
