Question

a ball of mass 20 gm is initially moving with a velocity of 100m/s on applying a constant force on the ball for 0.5s , it acquired a velocity of 150m/s . calculate the following:

3. final momentum of the ball.
4. Acceleration of the ball.
5. Magnitude of the force.​

Answer 1

Answer:

ANSWER

mass of the ball (m) =100g or 0.1kg

initial velocity (u) =25sm

time (t) = 0.025sec.

final velocity (v) = 0

Initial momentum = mu

                              = 0.1×25

                               = 2.5 skgm

Final momentum = mv (which is equal to 0, since v is zero)

Change in momentum = mv-mu

                                               = 0 - 2.5 = -2.5 skgm

Average force = timeChangeinmomentum

                                  = - 0.025(2.5) 

                               = -100skgm

                                 = -100 N

The negative sign actually shows that the force was applied

 opposite to the direction of the motion of the ball. 

So, the average force  applied by the player will be 100 

Explanation:

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