(a(i))[3]
On Fig. 8.2, draw the forces acting on the horse and add labels. Include the force applied by the rider to the horse. Call this force F.
(a(ii))[2]
Explain how Newton’s third law applies to force F.
(b(i))[2]
On each fence in Fig. 8.3, place a cross to show the centre of mass.
(b(ii))[2]
Explain why a wider base makes the fence more stable.
(c(i))[3]
As the horse and rider move towards a fence, their combined kinetic energy is 4000 J. Calculate their speed.
(c(ii))[3]
The centre of mass of the horse and rider is 1.4 m above the ground. The maximum potential energy gained by the horse and rider as they jump over the fence is 3000 J. Calculate the maximum height above the ground of the centre of mass during the jump. The gravitational field strength $g = 10\,\text{N kg}^{-1}$.