Why does rubbing a balloons on wool or hair make it attract other objects

Which would best reduce the amount of energy needed to pull a wagon up a ramp? 1. Increasing the slope of the ramp 2. Reducing the friction between the wagon wheels 3. Reducing the length of the wagon handle 4.

How would the force of Earth's gravity change if a satellite were to orbit at a distance that was only 1/2 of its original orbit? A. It cannot be determined. B. The force of gravity would increase. C. The force of gravity would not change. D.

A box is suspended with a series of ropes as shown below. When drawing the free body diagram, the force vector arrow for the cable marked as T should be drawn:

Explain energy transformation using basketball

Which of the following represents a convex lens? A. + f B. - di C. - f D. + di

Which of the following statement describes an actual orbit A. The planet Venus is a satellite of earth. B. Earth is a satellite of the planet Venus. C. Earth is a satellite of the moon. D. The planet Jupiter is a satellite of the sun.

There are four people in the car, the driver slams on the gas pedal and all the passengers heads hit the headrest behind them when the car accelerates forward.

A car travels 15 miles in 30 minutes. Calculate its average speed.

What two factors affect the strength of a gravitational attraction? How does each effect the strength

A spring is stretched 2 cm when a mass of 40 grams is hung from it what is the spring constant of the spring