- #1
pkc111
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I read the following question in a Yr11 High School Physics Test.
A trolley is traveling along at unifrom velocity when a weight is dropped onto it which stays there.
The velocity of the trolley will...
A) Decrease
B) Increase
C) Stay the same
?
The answer says "decrease" because of law of conservation of momentum.
But this doesn't seem right to me because it seems to disobey Newtons first Law which states that an object won't change its motion unless it is acted upon by a net force. Where is the net force??
Can anyone help explain?
Thanks
A trolley is traveling along at unifrom velocity when a weight is dropped onto it which stays there.
The velocity of the trolley will...
A) Decrease
B) Increase
C) Stay the same
?
The answer says "decrease" because of law of conservation of momentum.
But this doesn't seem right to me because it seems to disobey Newtons first Law which states that an object won't change its motion unless it is acted upon by a net force. Where is the net force??
Can anyone help explain?
Thanks