Mechanics questions | form five Physics

A stone thrown horizontally from the top of a vertical cliff with velocity 15 ms^-1 is observed to strike the horizontal ground at a distance of 45 m from the base of the cliff. What is the

1. Height of the cliff
2. Angle the path of the stone makes with the ground at the moment of impact?

Answer / Solution

UNSOLVED

A ball is thrown vertically upward and caught by the thrower on its return. Sketch a graph of velocity (taking the upward direction as positive) against time for the whole of its motion, neglecting air resistance. How. from such a graph, would you obtain an estimate of the  height reached by the ball?

Answer / Solution

UNSOLVED

Calculate the tension in the cable which delivers the power of 23 kW when pulling a fully loaded elevator at constant speed of 0.75 m/s.

Answer / Solution

UNSOLVED

1. Why the outer rail of a curved railway track is raised over the inner?
2. Based on Newton’s laws of motion explain how a helicopter gets its lifting  force.

Answer / Solution

UNSOLVED

Determine the internal energy produced by a bullet of mass 10 g travelling horizontally at a speed of 1.0×10​² ms​^-1 which embed itself in a block of wood of mass 9.9×10​²g suspended freely by two strings.

Answer / Solution

UNSOLVED