A roller coaster car with mass of 976 kg is at the top of a hill at rest. Assuming no friction and neglecting air resistance, what is the speed of the cart when it reaches the bottom of the hill, 45 m below?

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

What is a subatomic particle with a negative charge and very little mass?

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b