Question: At one instant, a 17.5-kg sled is moving over a horizontal surface of

Question

Question: At one instant, a 17.5-kg sled is moving over a horizontal surface of snow at 3.50 m/s. After 8.75 s has elapsed, the sled stops. Use a momentum approach to find the average friction force acting on the sled while it was moving.


Please check my work. If it is incorrect please provide detail.
Sled mass (m) = 17.5kg moving over a horizontal surface
initial velocity of (U) = 3.5 m/s
Initial momentum of the sledge
(P1)=mU
(P1)=(17.5kg)(3.50 m/s)
= 61.25 m/s
Sled stops at (t) = 8.75s
final velocity (V)=0
Initial momentum of the sled
(P2) =0
Newtons 2nd Law of Motion
F=P/t
= (P1-P2)/t
= (0-61.25 m/s)/8.75s
=7 m /s

This is the average friction force (F) acting on the sled while it was moving.

Explanation / Answer

Yes , your answer is correct < --

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.