How does frictional force produce. write down any two effect friction.​

What is the length x of the side of the triangle below? (hint: use the cosine function)

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?

During the past 150 years in the united states, how did energy consumption compare to population growth