What is the force that opposes motion and can be found anytime two surfaces are in contact?

friction

momentum

net force

spring forces

A shot-putter accelerates a 7.2 kg shot from rest to 17 m/s. what work did the shot-putter do on the ball?

What happens to the current in a circuit when the resistance is increased

If the pressure acting on a given sample of an ideal gas at constant temperature is tripled, then

A circular coil of radius 5.0 cm and resistance 0.20 Ω is placed in a uniform magnetic field perpendicular to the plane of the coil. The magnitude of the field changes with time according to B = 0.50e-20t T.

The following balanced equation shows the synthesis of ammonia (NH3). According to this equation, how many hydrogen atoms are in the final product?

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?