8a. The mass of a girl is 40 kg. Calculate her weight. (g = 9.8 m/s)

b. The weight of a stone is 98 N. Calculate its mass. (g = 9.8 m/s)

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

Aball horizontally thrown from a cliff at 8m/s