Question

1. Answer ALL parts (2 marks each). (a) A block accidentally falls from rest from the ledge of a 53.0 m high building. When the block is 14.0 m above the ground,what is its velocity? (b) A space traveller weighs 540 N on carth. What will the traveller weigh on another (e) A 41-kg box is thrown at a speed of 220 ms1 and is brought to a halt in a collision (d) A person pulls a toboggan for a distance of 35.0 m along the snow with a rope directed planet whose radius is three times that of earth and whose mass is thirty times that of earth? that lasts for a time of 6.5 ms. What is the magnitude of the average net force that acts on the box during the collision? 25.0° above the horizontal. The force on the rope is 94.0 N. How much work is done on the toboggan by the pulling force?

Answer 1

Displacement = -39 meter initial velocity = 0 acceleration = -9.8 m/s^2 By 3rd law of motion = v^2 = v^2 + 2as v = squareroot 2 times 9.8 times 39 v = 27.65 m/s