Average Acceleration

Q. The rate of change of velocity of an object with respect to time is called ..........

1. Momentum
2. Displacement
3. Acceleration
   
4. Impulse

Q.

A block is pushed on the ground with an initial velocity of 20 $\frac{m}{s}$, it stops after 6 seconds. What is the average retardation of the block?

1. $\frac{-10}{3}\frac{m}{s^2}$

2. $\frac{10}{6}\frac{m}{s^2}$

3. $\frac{20}{3}\frac{m}{s^2}$

4. $\frac{10}{3}\frac{m}{s^2}$

Q. A body gains velocity of 15 m/s in 5 s. The average acceleration in metre per second square is:

1. 9
2. 3
3. 6
4. 1

Q.

A body has an initial velocity of $4m{s}^{-1}$ and deceleration of $4m{s}^{-2}$. What is the final velocity after travelling a distance of $2m$?

1. $4m{s}^{-1}$
2. $0m{s}^{-1}$
3. $\sqrt{3}2m{s}^{-1}$
4. $16m{s}^{-1}$