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roxxyroxx
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Physics 11 question -- its probs rly easy !
A horizontal force applied to a 7.0 kg object initially at rest causes it to accelerate uniformly and travel a distance of 21m in 4.2s. What is the change in momentum of the object?
p = mv
Heres what i did but got it wrong:
p=mv
=(7.0kg)(0 m/s)
= 0
p=mv
=(7.0kg)(5m/s)
= 35
so the answer should be 35 ya?
but the answer in the back of the book is 70 kg x m/s
help??
Homework Statement
A horizontal force applied to a 7.0 kg object initially at rest causes it to accelerate uniformly and travel a distance of 21m
Homework Equations
p = mv
The Attempt at a Solution
Heres what i did but got it wrong:
p=mv
=(7.0kg)(0 m/s)
= 0
p=mv
=(7.0kg)(5m/s)
= 35
so the answer should be 35 ya?
but the answer in the back of the book is 70 kg x m/s
help??