A roller coaster track is 3000 meters long. It takes 100 seconds to travel once around the roller coaster. What is the average speed of the roller coast? Is the velocity constant throughout the trip? Explain

An amusement park ride consists of a rotating circular platform 7.33 m in diameter from which 10 kg seats are suspended at the end of 2.45 m massless chains. When the system rotates, the chains make an angle of 43.7 ◦ with the vertical.

Which statement best answers the question, "Why is copper a good conductor of electricity"? A. Copper atoms have a loosely held electron in their outer shell that is able to move freely to other atoms. B.

How would you describe the appearance of the substance after the phase change?

A block M = 1.25 kg is pulled up along an inclined plane by a constant force F which is parallel to the incline as shown. The coefficient of kinetic friction between the block and the plane surface µk=0.35. The block starts from rest at the bottom.

If there was no gravity acting on the object and it was launched at an upwards angle of 30 degrees, explain its path. The object would move downward at the same angle.

Tarzan runs at 6 m/s and grabs a vertical vine (negligible mass) 4.1 m long which is tied to a tree at the top. Tarzan swings up. Determine the maximum height Tarzan will swing up and the angle the vine makes respect to vertical.

What is the safest place to be amid the coronavirus?

What is the change in internal energy if 60 J of heat are added to a system and the system does 40 J of work on its surroundings? Use AU = Q-W.

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?

You then decide to throw another disc to your friend in the tree for fun. If you throw the disc at a speed of 10 m/s and your friend catches it 5.0 m above you, what was the speed of the disc just before your friend catches it