Question

a body of mass m is projected with a velocity 6i+8j.find change in momentum when it just touches the ground

Answer 1

here if the body is released vertically the after the mass hitting the ground only the y component changes its direction and becomes negative
hence the velocity becomes 6i-8j
therefore change in momentum i.e., Δmv=mx16i

Answer 2

Answer: Zero

Explanation:

• Momentum is defined as the product of mass of the body and the velocity with which it is moving.
• It is denoted ny letter P.
• We can say, P= mass × velocity

                         or P= m × v

• Here, the velocity vector is 6i + 8j.
• When a body just touches the ground then its velocity becomes zero.
• So we can say that the momentum of the body when it just touches the ground is zero.
• Hence, the required answer is zero.

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