The forces acting on a falling leaf are

A. gravity and static friction.

B. gravity and air resistance.

C. weight and rolling friction.

D. air resistance and fluid friction.

Two identical cars were involved in a collision at an icy intersection. Car A was stopped at a traffic light. Car B was moving at a speed vwhen it suffered a perfectly inelastic collision with the back end of car A.

One degree Celsius indicates the same temperature change as: A) one kelvin B) one degree Fahrenheit C) 9/5 kelvin. D) 5/9 degree Fahrenheit.

Find the potential 1.24 cm from a proton. the coulomb constant is 8.9876 * 109 n m2 / c 2 and the elemental charge is 1.602 * 10-19 c

Which type (s) of electromagnetic radiation do human bodies emit? Which type (s) can our senses detect?

Which physical of matter can be expressed numerically in Si units

A machine shovel moves dirt at the rate of 1,100 pounds of dirt 1 foot in 1 second. How many horsepower is this?

Two descriptions about physical quantities are given below: Quantity A: It is a force. Quantity B: It changes when the object travels from Earth to Earth's moon. What quantities are these most likely describing? A.

How does the tilt of Earth's axis affect how the sun's rays strike Earth?

A stone is tied to s string and whirled around in a circle at constant speed. Is the string more likely to break when the circle is horizontal or when it is vertical? Account for your answer, assuming the constant speed is the same.

Two blocks, stacked one on top of the other, slide on a frictionless horizontal surface. The surface between the two blocks is rough, however, with a coefficient of static friction equal to 0.50. The top block has a mass of 2.