Truck brakes can fail if they get too hot. in some mountainous areas, ramps of loose gravel are constructed to stop runaway trucks that have lost their brakes. the combination of a slight upward slope and a large coefficient of rolling friction as the truck tires sink into the gravel brings the truck safely to a halt. suppose a gravel ramp slopes upward at 6.0∘ and the coefficient of rolling friction is 0.38. use work and energy to find the length of a ramp that will stop a 15,000 kg truck that enters the ramp at 35 m/s.

d=16537m

Explanation:

The energy kinetic of the motion and the work of the friction determinate the length of the ramp

Kinetic energy

Work friction

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.