a? very small bus with a mass of 500kg and the initial speed of 0m/s travels down a slope. the horizontal distance of the slope is 80m long and starts at 30 m above the end point. the average friction force is 400N. what is the speed (m/s) of the bus if it arrives at the bottom of the slope?
a? very small bus with a mass of 500kg and the initial speed of 0m/s travels...
1.) A ball is thrown straight up with an initial speed of 15.715.7 m/s. At what height above its initial position will the ball have one‑half its initial speed? 2.) A child slides down a snow‑covered slope on a sled. At the top of the slope, her mother gives her a push to start her off with a speed of 1.101.10 m/s. The frictional force acting on the sled is one‑fifth of the combined weight of the child and the...
A 15.0 kg stone slides down a snow-covered hill, leaving point A at a speed of 10.0 m/s. There is no friction on the hill between points A and B, but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough horizontal region, the stone travels 100 m and then runs into a very long, light spring with force constant 2.0 N/m. The coefficients of kinetic friction between...
A 60.0-kg skier with an initial speed of 12.0 m/s coasts up a 2.50-m high rise as shown. You can assume she starts exactly at the bottom of the rise, and the coefficient of friction between her skis and all surfaces is 0.80. (a) Find the work done by friction during the climb. (b) Find her final speed at the top. (c) Find the distance she travels along the top horizontal surface before she comes to rest.
A small car with mass 0.670 kg travels at constant speed on the inside of a track that is a vertical circle with radius 5.00 m the following figure.If the normal force exerted by the track on the car when it is at the top of the track (point B) is 6.00 N, what is the normal force on the car when it is at the bottom of the track (point A)?
Part A A 11.0 kg stone slides down a snow-covered hill, leaving point A with a speed of 12.0 m/s. There is no friction on the hill between points A and B but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough horizontal region, the stone travels 100 m and then runs into a very long light spring with force constant k = 250 Nm. The coefficients of...
Two bicycle tires are set rolling with the same initial speed of 4.00 m/s along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 psi and goes a distance of 19.0 m ; the other is at 105 psi and goes a distance of 92.8 m . Assume that the net horizontal force is due to rolling friction only and take the...
Two bicycle tires are set rolling with the same initial speed of 3.10 m/s along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 psi and goes a distance of 19.0 m ; the other is at 105 psi and goes a distance of 92.5 m . Assume that the net horizontal force is due to rolling friction only and take the...
A bus accelerates at 1.7 m/s from rest for 13 s. It then travels at constant speed for 22 s, after which it slows to a stop with an acceleration of magnitude 1.4 m/s2. (a) What is the total distance that the bus travels? km (b) What was its average velocity? m/s eBook
A skier with mass 64.0 kg starts at rest at the top of an 842 m long ski slope, which makes an angle 13.0 ∘ with the horizontal. A typical coefficient of friction between skis and snow is 5.20×10−2. skiers don't go straight down the hill- they zigzag back and forth. Even though they still end up at the bottom of the hill, they've lost more energy to friction because friction is a non-conservative force. Let's say due to zigzagging,...
A projectile launched at initial speed of 75 m/s at an angle of 30 degrees travels a horizontal distance of 421.2 m. How long did the projectile travel before hitting ground? Calculate the maximum height this projectile can reach.