Mechanics | Relativity Answers

how long would you have to apply a 100 n force to a 50 kg mass to increase its velocity from 100 m/s to 150 m/s?

suppose an automobile collides with another automobile that is stopped. If both automobiles have the same mass, what do you expect to happen in the resulting collision?

If mass is provided in the prompt, but not the normal force, how can you still properly solve for the friction force?

A. Suppose a cosmic ray colliding with a nucleus in the Earth’s upper atmosphere produces a muon that has a velocity v=0.950c . The muon then travels at constant velocity and lives 1.52 ms as measured in the muon’s frame of reference. (You can imagine this as the muon’s internal clock.) How long does the muon live as measured by an Earth-bound observer?

A muon in the Earth’s atmosphere lives longer as measured by an Earth-bound observer than measured by the muon’s
internal clock.

A spring with a spring constant of 6.2 N m−1 is used to launch a 5.0 g slider along a frictionless track as shown in the figure above. The spring is compressed by 16 cm.

To what height h above the height labeled 0 m in the figure does the slider reach? (in m to 2 s.f)

You have a 2kg bag of rice in your emergency supplies. If you pull it with 20 N of force, what is its acceleration?

horizontal escalator connecting airport terminals is 1km long. two kids from opposite ends and run toward each other at 3m/s and meet 600m from the start of the escalator. what is the speed of the escalator?

You catch an exotic beetle while you are in the garden. You tie one of the feet of the beetle to string and then hold the other end of string. Once you release the beetle from your hand, the beetle starts flying in circle in a counterclockwise manner with a velocity of 8 m/s2. The length of the string from your hand to the beetle’s foot is 14 inches. What is the angular momentum of the beetle?

A 72.1 kg weight-watcher wishes to climb a
mountain to work off the equivalent of a large
piece of chocolate cake rated at 831 (food)
Calories. How high must the person climb? The
acceleration due to gravity is 9.8 m/s2 and 1
food Calorie is 103 calories.
Answer in units of km.

A 30 N object is on a 2.0 kg wagon as it is being pulled at a constant velocity by a 10.0 N force 20.0 0 above the positive horizontal. Calculate:

a. The normal force acting on the wagon

b. The frictional force acting on the wagon