1. Compute the power output of a machine that lifts a 500-kg crate through a height of 20.0 m in a time of 60.0 s.
2. A 1200-kg gun mounted on wheels shoots an 8.00-kg projectile with a muzzle velocity of 600 m/s at an angle of 30.0°; above the horizontal. Find the horizontal recoil speed of thegun.
3. A 2.0-kg block of

The lead female character in a movie is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.010 kg and its velocity is 720 m/s. Her mass (including thegun) is 51 kg.
(a) what recoil velocity does she acquire in response to a si

A 78-kg ice hockey player standing on a frictionless sheet of ice throws a 6.0-kg bowling ball horizontally with a speed of 3.0 m/s. Withwhatspeeddoesthe hockey player recoil? I need to see each step and formula to solve this question.

The nucleus of the polonium isotope 214Po (mass 214 u) is radioactive and decays by emitting an alpha particle (a helium nucleus with mass 4 u). Laboratory experiments measure thespeed of the alpha particle to be 1.59*10^7 m/s . Assuming the polonium nucleus was initially at rest, what is the recoil velocity of the nucleus that

A pitcher claims he can throw a 0.168 kg baseball with as much momentum as a 3.32 g bullet moving with a speed of 1.21584x10^5 m/s. What must be its speed if the pitcher's claim is valid? Answer in units of m/s.
This is an "explosion" question. A 30-06 caliber hunting rifle fires a bullet of mass 0.0115 kg with a velocity of

A gun is fired straight up. Assuming that the air drag on the bullet varies quadratically withspeed, show that thespeed varies with height according to the equations:
v^2 = g/k - Be^(2kx) (downward motion)
v^2 = Ae^(-2kx) - g/k (upward motion)

A gun fires a bullet of mass 17 grams out of a barrel 24 cm long. The bullet is accelerated down the length of the barrel with an average force of 16 Newtons.
Using the Impulse-Momentum Theorem, determine the velocity with which the bullet exits the barrel.
What average force is exerted by the individual holding thegun

Please see attachment. Thank You your help is greatly needed.
1. A stunt person jumps from the roof of a tall building, but no injury occurs because the person lands on a large, air-filled bag. Which one of the following best describes why no injury occurs?
2. Jennifer is walking at 1.63 m/s. If Jennifer weighs 583 N, what

You need to verify which gun fired a bullet in a police investigation with a very limited budget. There are two guns involved in a crime; both could fire bullets of the same kind of mass (0.1kg). One is an assault rifle which fires the bullet at speed of 300m/s; the other is a hand gun which fires the same bullet withspeed of 2