Ahollow cylinder of mass m and radius r rolls down an inclined plane. a block of mass m slides down an identical inclined plane. if both objects are released at the same time,
a) the cylinder will reach bottom first
b)the block will reach the bottom first
c) the block will reach the bottom with greater kinetic energy
d) the cylinder will reach bottom with greater kinetic energy
e) the block and the cylinder will reach the bottom at the same time.

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

The heliocentric and the geocentric models of the solar system included these central principles

What are the necessary conditions for fusion?