A skier starts from rest and slides downhill. What will be the speed of the skier if he drops by 20 meters in vertical height? Ignore any air resistance (which will, in reality, be quite a lot), and any friction between the skis and the snow

A man (mass 45 kg) shoots himself out of a cannon straight upward with an initial velocity of 46 m/s towards a ledge 95 m above the cannon. There’s some air resistance occurring, and the man’s upward trajectory ends 6.0 meters below the ledge. A) What was the average force of frictional air resistance the man experienced during his upward motion? B) Assuming the same average air resistance on the way down, how fast will the man’s impact velocity be when he returns to the “ground” level of the cannon’s muzzle? Please answer the question on paper. I do not understand when it is typed out. Thank you

A bowling ball is dropped from the top of a building that has a height of h = 112 m. Part (a)  Assuming air resistance is negligible, what is the ball's speed, vf in m/s, when it strikes the ground?Part (b)  If drag produces an opposing force of 10 N while the ball's falling, what is the ball's speed, vf in m/s, when it strikes the ground? Assume the ball has a mass of 5 kg.Part (c)  A different ball was dropped and the final speed was measured to be vf = 8.5 m/s while the drag force was measured to be 50 Newtons. What is the mass of this ball in kg?

a 500 N block fromtesfrom rest slides 6m down a 45 degrees slope. the 3m along a level surface and then up 30 degrees incline until it comes to rest again. the coefficient of friction is 0.15 for all surfaces. what is the distance travelled by the block up the 30 degrees inclined yntiuntil it stops. what is the total distance traveled by the block. what is the velocity when uit reach the level surface. what is the velocity of the block just before it travels up the 30 degrees inclined.

You throw a rock of mass 0.750 kg straight up in the air with an initial speed of 20.0 m/s. Throughout the flight of the rock assume there’s a constant air resistance force of magnitude 1.25 N acting on it. The trajectory of the rock is vertically up and down, with no horizontal motion. (a) What is the maximum height reached by the rock?  (b) What is the speed of the rock when it returns to the point of release?

An 80 kg skier sliding across a flat smooth ice surface at 20 m/s reaches a flat muddy surface with a coefficient friction of 1.2. How far does she travel before stopping

On September 8, 2004, the Genesisspacecraft crashed in the Utah desert because its parachute did not open.The 210 kg capsule hit the ground at 311 km/h and penetrated the soilto a depth of 81.0 cm. How long did this force last?

A semitrailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway-truck ramp that is inclined at an angle of 14.08 above the horizontal. The semitrailer coasts to a stop after traveling 154 m along the ramp. What was the truck’s ini- tial speed? Neglect air resistance and friction.