When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 66.1-kg man just before contact with the ground has a speed of 8.31 m/s. (a) In a stiff-legged landing he comes to a halt in 3.25 ms. Find the magnitude of the average net force that acts on him during this time. (b) When he bends his knees, he comes to a halt in 0.160 s. Find the magnitude of the average net force now. (c) During the landing, the force of the ground on the man points upward, while the force due to gravity points downward. The average net force acting on the man includes both of these forces. Taking into account the directions of the forces, find the magnitude of the force applied by the ground on the man in part (b).

Q: Dizzy is speeding along at 30.4 m/s as she approaches the level section of track near the loading…

A: Given:- The initial velocity is u = 30.4 m/s  The final velocity is v = 3.95 m/s  The mass of the…

Q: A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in…

A: Given data: Time interval (Δt) = 0.0042 s Mass (m) = 55 g = 0.055 kg Initial velocity (v0) = 0 m/s…

Q: Mechanic Physics: Please make sure this is right!! The only force acting on a 1.7 kg body as it…

A:

Q: A crane drops a 1.7 kg steel ball onto a steel plate. The ball's speeds just before impact and after…

A:

Q: After falling from rest from a height of 28 m, a 0.35-kg ball rebounds upward, reaching a height of…

A: Given: Mass of the ball, m = 0.35 kg   Initial height, h1=28 m  Final height, h2= 18 m Contact…

Q: 6.3-kg toboggan is kicked on a frozen pond, such that it acquires a speed of 2.2 m/s to e right. The…

A: