Answer:
39.2 N
Explanation:
1kg at the earth's surface has a force of 9.8 N acting on it.
(4 kg) (9.8N) = 39.2 N
Answer:8.69 m/s
Explanation:
Given
mass of Empty train
velocity of car
mass of Boulder
Since no External force is acting therefore conserving Momentum
Train and boulder moves with same velocity after collision
1 the mantle is the layer