Answer:
v' = -2.5 cm/s
Explanation:
given,
mass of toy car, m = 10 g
speed of right, u= 20 cm/s
mass of toy car, M = 24 g
speed opposite, u' = 35 cm/s
after collision
10 g car moves to left, v = 58 cm/s
v' = ?
using conservation of momentum
m u + M u' = m v + M v'
10 x 20 - 24 x 35 = - 10 x 58 + 24 x v'
24 x v' = -60
v' = -2.5 cm/s
speed of second car after collision = -2.5 cm/s
Answer:
the answer is C. rocket 4.
Explanation:
it's the biggest amongst the four.
rocket one has an acceleration of 34.782...
rocket two has an acceleration of 22.429...
rocket three has an acceleration of 26.666...
rocket four has an acceleration of 36.923
Answer:
due to heaviness
Explanation:
because metal is heavier than water
Answer:
He does postive work
Explanation:
Because W= F xS sinစ
So since work is done such that Force and distance have the Sam direction
Thus စ=0
Then work is positive in value