Motion CBSE

If a body starts from rest, what can be said about the acceleration of body?

• Positive acceleration

• Negative acceleration

• Uniform acceleration

• NOA

When a body moves uniformly along the circle, then:

• Its velocity changes but speed remains the same.

• Its speed changes but velocity remains the same

• Both speed & velocity changes.

• Both speed & velocity remains same.

What does the slope of velocity - time graph give?

• Distance

• Displacement

• Change in velocity

• Acceleration

Calculate the acceleration & distance of the body moving with 5 m/s^2 which comes to rest after travelling for 6 seconds.

A train is travelling at a speed of 90 Km/h. Brakes are applied so as to produce a uniform acceleration of 0.5 m/s^2. Find how far the train will go before it is brought to rest.

An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered & the displacement at the end of 2 minutes 20 s?

The position of a body at different times are recorded in the table given below:

(a) Draw the displacement time graph for the above data.

(b) What is the slope of the graph during the time interval 4-6 seconds?

(c) What will be the speed of motion during the time interval 3-7 seconds?