Question

During the last shot of the game, the basketball goes from rest to 15 m/s and reaches the backboard in 0.41 s. What was the acceleration of the ball? ​

Answer 1

Answer:

The acceleration is 36.5853659

Explanation:

Acceleration is the change in velocity over the amount of time so for this it would be 15ms/.41s so the acceleration would be 36.5853659$m/s^{2}$

Answer 2

Answer:

When you climb, earth exerts gravitational force on pack in downward direction(pointing towards the center of earth).

In order to climb, you need to work against work done by gravity on the pack.

Hence work done by you = work done by gravity on pack  

                                       = Force x displacement = 70 x 30 = 2100 J.

 

So you need to do 2100 joules of work to lift your pack.

Power is the rate of work done.

Therefore power = work done by you/time(in seconds)

                           =     2100/600 =3.5 watts

Explanation: