An astronaut on some Planet Y holds a rock 136m above the surface of the planet
He then throws the rock upward with a speed of 16m/s, as shown.
The rock reaches the ground in 12s after it is thrown.
The atmosphere of Planet Y has a negligible effect on the rock when it is in free fall.
Determine the acceleration due to gravity on Planet Y.
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You are designing an elevator for a hospital.
The force exerted on a passenger by the floor of the elevator is not to exceed 1.22 times the passenger’s weight.
The elevator accelerates upward with constant acceleration for a distance of 2.6m and then starts to slow down.
Use acceleration due to gravity g = 10m/s2.
What is the maximum speed of the elevator?
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A block of mass m=1.16kg is resting on an incline that makes an angle ?=54? with the horizontal, as shown in the diagram.
The block is pushed up against a coiled spring that is compressed to a new length of l=5cm.
The spring has spring constant k=728N/m and the natural length of the spring is L=18cm.
The block is initially at rest. How far (d) along the inclined plane will the block rise (in meters)?
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