A) Block 1 (5 kg) is pulled by a rope from left to right up a ramp which is inclined 45 degrees from the horizontal.

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A) Block 1 (5 kg) is pulled by a rope from left to right up a ramp which is inclined 45 degrees from the horizontal. The rope pulls on block 1 with a force of 65 N parallel to the surface of the inclined plane. The coefficient of kinetic friction between the block and the surface equals 0.2.
Assume that the x-axis is parallel to the incline and positive in the direction up the incline.

What is the magnitude of the acceleration a of block 1?
a =

B) A 1200-kg car travels at 26 m/s and then quickly stops in 3.4 s to avoid an obstacle. What is the magnitude of the average force in kiloNewtons (kN) that stopped the car?

C) Puck 1 (1 kg) travels with velocity 10 m/s to the right when it collides with puck 2 (1 kg) which is initially at rest. After the collision, puck 1 moves with a velocity of 2.5 m/s. Assume that no external forces are present and therefore the momentum for the system of pucks is conserved. What is the final velocity (in m/s) of puck 2 after the collision?

Expert Solution

genius_generous answered 2 years ago

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