Gravity is a force.

True

False

A box rests on top of a flat bed truck. the box has a mass of m = 18 kg. the coefficient of static friction between the box and truck is μs = 0.86 and the coefficient of kinetic friction between the box and truck is μk = 0.69.

A 20 kg bike accelerates at 10 m/s2. With what force was the person pedaling if friction exerted a force of 100N?

A star is in hydrostatic equilibrium when the outward push of pressure due to core burning is exactly in balance with the inward pull of gravity.

A racquetball strikes a wall with a speed of 30 m/s and rebounds with a speed of 26 m/s. The collision takes 20 ms. What is the average acceleration of the ball during collision? a. zero b. 1500 m/s2 c. 1300 m/s2 d. 200 m/s2 e. 2800 m/s2

Specific gravity is the density of an object compared to water. a. True b. False

What happens to the inertia of an object of its mass is decreased?

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.