A 2-kg toy car accelerates from 0 to 5 m/s. A 2-kg toy car originally moving at 5 m/s is brought to rest.

A 2 kg toy car is held at a height of 3.75 m above the floor.

A 2-kg toy car accelerates from 5 to 10 m/s.

A 2-kg toy car accelerates from 10 to 5 m/s.

Ahollow metal sphere has 6 cm and 11 cm inner and outer radii, respectively. the surface charge density on the inside surface is −100nc/m2. the surface charge density on the exterior surface is:

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.