bullet of mass 3.0g moving at 350m/s hits a tree and penetrates through a distance of 12 cm before coming to rest. Determine the retarding force exerted on the bullet

2. A pitcher claims he can throw a baseball| with as much momentum as a 3.00-g bullet moving with a speed of 1 500 m/s. A baseball has a mass of 0.145 kg. What must be its speed if the pitcher's claim is valid?

Calculate the final speed (in m/s) of a 100 kg rugby player who is initially running at 7.50 m/s but collides head-on with a padded goalpost and experiences a backward force of 1.65 x 10* N for 7.50 x 10 -2 S. m/s

A 0.750 kg hammer is moving horizontally at 4.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact in seconds. (b) What was the average force in newtons exerted on the nail? |N

A 115kg rugby player is initially running at 5.5 m/s in the + direction, but collides with a goalpost and experiences a backward force of 1.71 × 10^4 N for 5.25 × 10^-2 s. what is the final \velocity of the rugby player in the horizontal direction

A car is initially traveling at a speed of 90 km/h, suddenly brakes so that the speed becomes 36 km / h in an interval of 6 s. If style that stops the car at 3200 N, what is the mass of the car?

During a practice dive, a 45-kgkg diver jumped to a maximum height of 4.4 mm above the water before coming down and entering the water. She came to rest 0.40 ss after hitting the water. Determine the average force that the water exerted on her while stopping her.

Daredevil Darla has heard that to avoid injury when jumping out of her rocket she should bend her knees upon landing. Darla has a mass of 74 kg. If just before contact with the ground, she has a downward speed of 7.3 m/s, then. . .   (a) In a stiff -legged landing she comes to a halt in 2.0 ms. Find the average net force that acts on her during this time. (   b) When she bends her knees, Darla comes to a halt in 0.10 s. Find the average net force now.   (c) During the landing, there are two forces acting on Darla: the normal force from the ground points upward, while her weight force points downward. The average net force acting on Darla includes both of these forces. Taking into account the directions of the forces, find the force of the ground on Darla in parts (a) and (b).