If you wish to slow a 150,000. kg train down to zero velocity by applying a force of 2150. Newtons in 125. seconds, what is the maximum speed the train could have in m/s before you start slowing it down?
If you wish to slow a 150,000. kg train down to zero velocity by applying a...
1.) A 1.7-kg falcon catches and holds onto a 0.675-kg dove from behind in midair. What is their final speed, in meters per second, after impact if the falcon’s speed is initially 27 m/s and the dove’s speed is 7.5 m/s in the same direction? 2.) a.) A bowling ball of mass mb = 3.7 kg is rolled down the lane with a velocity of v1 = 2.8 m/s. It strikes a single remaining pin mp = 0.92 kg head...
The brakes are applied to a moving car, causing it to uniformly slow down. While slowing, it moves a distance of 40.0 m in 7.65 s to a final velocity of 1.95 m/s, at which point the brakes are released (a) What was its initial speed (in m/s), just before the brakes were applied?(b) What was its acceleration (in m / s²) while the brakes were applied? (Assume the initial direction of motion is the positive direction. Indicate the direction with the...
A light-rail train going from one station to the next on a straight section of track accelerates from rest at 1.20 m/s2 for 12.6 s . It then proceeds at constant speed for 1300 m before slowing down at 2.00 m/s2 until it stops at the station. What maximum velocity does the train achieve after leaving the station? What is the distance between the stations? How much time does it take the train to go between the stations?
The brakes are applied to a moving van, causing it to uniformly slow down. While slowing, it moves a distance of 40.0 m in 7.90 s to a final velocity of 2.00 m/s, at which point the brakes are released. (a) What was its initial speed (in m/s), just before the brakes were applied? m/s (b) What was its acceleration (in m/s2) while the brakes were applied? (Assume the initial direction of motion is the positive direction. Indicate the direction...
A train moving in a straight line with an initial velocity of 0.50 m/s accelerates at 2.0 m/s^2 for 2.0 seconds, coasts with zero acceleration for 3.0 seconds, and then accelerates at -1.5 m/s^2 for 1.0 seconds. (a) What is the final velocity of the train? (b) What is the average acceleration of the train? Thank you!!!!1
A runaway train car that has a mass of 14500 kg travels at a speed of 5.8 m/s down a track. Randomized Variables: m = 14500 kg, v = 5.8 m/s, F = 1250 N Part (a) What is the time required for a force F to bring the car to rest, expressed in terms of m, v, and F? Part (b) Compute this time, in seconds, for a force of 1250 N.
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5. A person of mass 70 kg, is descending in an elevator at a constant velocity of 4.0 m/s. At 10 seconds, the elevator starts to slow to a stop at the rate of 1.0 m/s2 a) Draw a Free Body Diagram for the person in the elevator as it descends at (a) constant speed and (b) during its period of acceleration. a) Constant Speed b) Acceleration b) The man in the elevator is standing on...
It is sometimes claimed that friction forces always slow an object down, but this is not true. If you place a box of mass 3 kg on a moving horizontal conveyor belt, the friction force of the belt acting on the bottom of the box speeds up the box. At first there is some slipping, until the speed of the box catches up to the speed of the belt, which is 3 m/s. The coefficient of kinetic friction between box...
(2 + 2 + 2 = 6 marks) While driving on highway 401 you see a traffic jam ahead. Not wanting to apply the brake, you take your foot off the gas and let the car slow down on its own. Your acceleration is -4.0 m/s2 (remember you are slowing down) and the mass of the car is 1 200 kg. a) How much frictional force acted to slow down the car? b) While slowing down, the car travels 85...
Assume you want to slow down a 2700-lb car in a safe way, that is, you want the first barrel to slowdown the car by 10 mph from its original speed which is 60+ your birth month (so if you are born in May, speed 65 mph). 1. What is the speed of the car before impact? 2. Assume elastic collision. How many pounds does the barrel need to weigh to slow down the car by 10 mph? Give the...