A 50 kg car is pushed so that it speeds up from 20 m/s to 50 m/s in 3 seconds. What is the force acting on the car?

A

500 N

B

0.2 N

C

10 N

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

In which of the following situations does the scalar product of two vectors have the largest value? Group of answer choices The angle between the two vectors is sixty degrees. The angle between the two vectors is forty five degrees.

How much heat is needed to raise the temperature of 90g of water by 86oC

The accompanying drawing represents a mixture of three different gases. (a) rank the three components in order of increasing partial pressure. (b) if the total pressure of the mixture is 1.40 atm, calculate the partial pressure of each gas.

A collision at 30 mph will take any loose object in your car and give it the same force as if it were: A. Propelled by a slingshot. B. Thrown. C. Shot from a cannon.

Which sequence lists types of material in order from least conductive to most conductive

Spectrum is Latin for which word? A. appearance B. scale C. range D. spread

How is work related to force and displacement?

Calculate the buoyant force (in N) on a 1.0 m^3 chunk of brass submerged in a bath of mercury.

What is the current produced by the solar cells of a pocket calculator through which 4.00 C of charge passes in 4.00 hr? Give your answer in mA.