Does an object need a force to start moving

Which statements correctly compare the gravitational force with the electrical force? a. The gravitational force can be repulsive. b. The gravitational force can be attractive. c. The electrical force can be repulsive. d.

Air pressure is gravity pulling down on air molecules. a. True b. False

One way that a magnet's domain could become unaligned is which of the following? A. by using it too much B. by heating it C. by breaking it D. by putting it near a magnet that repels it

The diagram shows light passing through an opening and forming bands. Which two order bands are the dimmest?

List one type of erosion and describe how it happens?

A mechanic pushes a 3.00 ✕ 103-kg car from rest to a speed of v, doing 4,680 j of work in the process. during this time, the car moves 26.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Explain how latitude determines wind patterns

What is the difference between contact forces and forces that act through a force field?

Suppose two parallel-plate capacitors have the same charge Q. but the area of capacitor 1 is A and the area of capacitor 2 is 2A. 1.

You want to launch a stone using the elastic band of a slingshot. The force that the elastic band applies to an object is given by F = - α∆s4, where α = 45 N m4 and ∆s is the displacement of the elastic band from its equilibrium position.