Question

A cricket ball of mass 100g moving with a speed of 30m/s is brought to rest by a player. Then find the change in momentum.​

Answer 1

Answer:

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I guess the question is the rate of change in momentum

Mass= 0.1 kg

Initial Momentum= m*speed (u)=0.1*30= 3

Final Momentum= m* rest (v)= 0.1*0 = 0

Change in Momentum= Final-Intial = 0-3 = -3

Rate of change in momentum= (change in momentum)÷time taken 

                                               = (-3)÷0.03

                                               = -100

Answer 2

Correct Question:

A cricket ball of mass 100g moving with a speed of 30m/s is brought to rest by a player in 0.03 second. Find the change in momentum.

Answer:

• Change in momentum = - 3 kg m/s.

Explanation:

Given:

• Mass = 100 g = 0.1 kg
• Initial speed = 30 m/s
• final speed = 0 m/s

To Find:

• Change in momentum.

Formula Used:

• Initial momentum = mu
• Final momentum = mv
• Change in momentum = mv - mu

Now, first we will find initial momentum.

➟ Initial momentum = mu

➟ Initial momentum = 0.1 × 30

➟ Initial momentum = 3 kg m/s

Now, we will calculate final momentum,

➟ Final momentum = mv

➟ Final momentum = 0.1 × 0

➟ Final momentum = 0 kg m/s

Now, we will find change in momentum,

➟ Change in momentum = mv - mu

➟ Change in momentum = 0 kg m/s - 3 kg m/s

➟ Change in momentum = - 3 kg m/s

Hence, Change in momentum = - 3 kg m/s.