Question

A ball of mass 500g is thrown upwards with a velocity of 15m/s. Calculate its momentum at the highest point

Answer 1

Answer:

zero.

Explanation:

at the highest point the ball will come at rest for a few seconds, which will make the velocity zero so the momentum will also become zero.

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Answer 2

Concept:

• Projectile motion
• Using equations of motions
• Momentum

Given:

• The mass of the ball = 500g = 0.5kg
• Initial velocity of the ball thrown upwards = 15m/s

Find:

• The momentum at the highest point of the motion

Solution:

• The ball exhibits projectile motion
• At the highest point of a projectile motion, the velocity of the ball is zero
• The momentum of an object is the product of the mass of the object and the velocity of the object
• p =mv
• Since the velocity of the ball at the highest point is zero, the momentum p = 0.5 x 0 = 0

The momentum of the ball at the highest point is 0.

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