Horizontal force pulls a body of 2.25 kg a distance of 8 m across a rough horizontal surface, coefficient of friction 1/3. The body moves with constant velocity and the only resisting force is due to friction. Find the work done against friction. [2 marks] Q2
The point A is 4 m vertically above the point B. A body of mass 0.2 kg is projected from A vertically downwards with speed 3 m/s. Find the speed of the body when it reaches B. [7 marks]
Q3
A body of mass 2 kg, passing through two points A and B. The speeds of the body as it passes A and B are 1 m/s and 4 m/s respectively. The resistance against which the body falls is 9.6 N. Use energy considerations to determine the distance AB. [5 marks]
Q4
A particle is projected horizontally with a velocity of 39.2 ms-2. Find the horizontal and vertical components of the velocity of the particle 3 seconds after projection. Find also the speed and direction of motion of the particle at this time. [6marks]​