Motion (Edexcel International A Level Physics)

A trolley accelerates from rest at point A, down a straight track to point B. The trolley then continues along a horizontal track to point C, as shown.

The effects of air resistance and friction are negligible.

Show that the trolley reaches point B with a speed of about 3 m s⁻¹ .

Determine the time taken by the object to move from point A to point C.

Time taken = ..........................

A skier moving at 25 m s⁻¹ skis off a ramp. The ramp is angled upwards at 10° to the horizontal, as shown.

There is a flat surface that starts 30 m from the ramp. The flat surface is 2.9 m below the ramp.

Another skier travels along the horizontal surface with an initial speed of 23 m s−1 .

She comes to rest after travelling a distance of 43 m.

Calculate the average force required to bring the skier to rest.

   mass of skier = 63 kg

                              Average force = .............................