A car x of mass 1000kg moves at a speed of 20m /s in direction due East collides head on with an other car Y of mass 1500kg move
s at 15m/s in a direction due west if two cars stick together find their common velocity after collision
1 answer:
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Answer:
B) 35 W
Explanation:
Force applied by child = 75 N = F
Distance travelled by child = 42 m = d
Time traveled for is 1.5 min = 1.5×60 = 90 seconds = t
Work done by the child
W = Fdcosθ
⇒W = 75×42cos0
⇒W = 3150 Joule
Power is defined as work done per unit time
∴ The average power generated by the child is 35 W