Which of these is not an example of work? A. Lifting a bag B. Holding a heavy weight C. Pushing a door open D. Kicking a ball

Andrew pokes a marble, and the marble rolls down a ramp. The marble moves with speed. Which forces are acting on the marble in this situation? When Andrew pokes the marble, he gives it force. As the marble rolls down the ramp, force pulls it down.

Which of the following is considered a physical change? A:burning paper B:rusting of metal C:evaporating water

In order to do work, the force vector must be Question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion.

A bicyclist of mass 112 kg rides in a circle at a speed of 8.9 m/s. If the radius of the circle is 15.5 m, what is the centripetal force on the bicyclist?

at t=0s a car has a speed of 30m/s. at t=6s, its speed is 14m/s. what is its average acceleration during this time interval?

How do you best determine whether j/m2 and m*s2/N are equivalent units? Compare the written form of the units to see if they look the same. Notice that one unit contains joules and other newtons.

Which state must be supplied with the most energy to turn it into a gas

The heating element of an electric oven is designed to produce 5.0 kw of heat when connected to a 220 v source. what must be the resistance of the element?

Suppose all the grains in a sample of sand were exactly the same size. Could the sample still be a heterogeneous mixture?

A refrigeration system is to cool bread loaves with an average mass of 350 g from 30 to - 10°C at a rate of 1200 loaves per hour with refrigerated air at - 30°C. Taking the average specific and latent heats of bread to be 2.93 kJ/kg·°C and 109.