Tom of mass 3 kg is sleeping over skate board at
rest and Jerry of mass 500 g is running with a
velocity of 20 m/s towards Tom. If Jerry jumped on
Tom and both start skating on the same board then
the combined velocity of Tom and Jerry just after
they collide is (Assume skate board has a mass 500
g)
Answers
Given :
Tom of mass 3 kg is sleeping over skate board at rest and Jerry of mass 500 g is running with a velocity of 20 m/s towards Tom.
skate board has a mass 500 g
To Find : Jerry jumped on Tom and both start skating on the same board then the combined velocity of Tom and Jerry just after collide
Solution:
Tom of mass 3 kg is sleeping over skate of 500 g
Hence total Mass = 3 + 0.5 = 3.5 kg
Jerry of mass 500 g is running with a velocity of 20 m/s towards Tom
initial momentum = mv as Tom is one rest
= 0.5 * 20
= 10 kgm/s
Jerry jumped on Tom and both start skating on the same board
Hence total mass = 3.5 + 0.5 = 4 kg
10 = 4 ( v)
=> v = 2.5
combined velocity of Tom and Jerry just after collide = 2.5 m/s
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Answer:
Step-by-step explanation: