Which of the following is a practical example of gravity acting on an object. A.) A leaf falls from a tree and floats to the ground.

B.) A diver jumps off a diving board and splashes into a pool below.

C.) A car speeds up as a traffic light turns green.

D.) Rain falls from the sky.

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.