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Friction
Static and Kinetic Calculations
Rolling Friction Calculations
Old Physics Problems
Random
100
What is the name of the friction of a moving object?
Kinetic Friction
100
A 5 Newton rubber block rests on a horizontal sheet of glass. The block is pulled at a constant velocity with 5.5 Newtons of force. Calculate the coefficient of kinetic friction.
.91
100
You give a 10 kg cart a push of 200 Newtons. The cart has a rolling friction of 50 Newtons. What is the cart’s acceleration?
15 m/s/s
100
A ___________ is a measurable physical quantity.
dimension
100

Which team took first place in the flag competition in the 2023-24 school year?

Constellations

200
If you are dragging an object south which way will the magnitude of the kinetic friction point?
north
200
A block has a coefficient of kinetic friction of 0.8. The block has a mass of 100 kg. How hard must you push the block to keep it moving at a constant velocity?
785 Newtons
200
A 2.5 kg wheeled laboratory cart rolls down an incline 30 degrees with the horizontal. If the magnitude of rolling friction is 5 N, what is the cart’s acceleration?
6.5 m/s/s
200
If a wheel has an angular speed of 2.5 radians/s, what will its speed be in rpm?
23.9 rpm
200

Bernie Sanders is a US Senator from which state?

Vermont

300
Which of the following does not change the kinetic friction: a) type of surfaces in contact b) the amount of surface area in contact c) the mass of the sliding object d) the normal force of the sliding object
b)
300
A worker pushes a 50 kg block with 100 Newtons of force and it does not move. The coefficient of static friction must be greater than what value?
greater than .204
300
A 10 kg block is on an incline of 45 degrees from the horizontal. For the system, us = 0.61 and uk = 0.50. Will the block move?
Yes
300
I’m swimming north at 30 m/s but the current is going west at 20 m/s. For an observer from the north bank, what would my speed appear to be?
36.05 m/s.
300

Which MLB team won the world series in 2010?

San Francisco Giants

400
Which type of friction is usually the highest?
static friction
400
A 100 kg metal crate rests on a smooth concrete floor. The coefficients of friction for the metal and concrete are us = 0.75 and uk = 0.60. A worker pushes with 600 Newtons. Can he push the crate across the floor?
No
400
A 10 kg block is on an incline of 40 degrees from the horizontal. For the system, us = 0.61 and uk = 0.50. Find the acceleration of the block.
2.5 m/s/s
400
5)A ship has two engines both at a 50 degree angle from the front. If each engine propels with a force of 100,000 Newtons, what is the net force acting on the ship?
1285.6 N
400

What is Sheldon's catchphrase for when he thinks he is being funny? (Big Bang Theory)

Bazinga!

500
What is the name of the force that will actually cause the car to accelerate?
Propelling force
500
A 100 kg metal crate rests on a smooth concrete floor. The coefficients of friction for the metal and concrete are us = 0.75 and uk = 0.60. A worker pushes with 800 Newtons. What is the acceleration of the crate?
2.11 m/s/s
500
A 5 kg block rests on a frictionless surface and is connected by string and pulley to a 50 kg block on an incline of 50 degrees from the horizontal. For the system, us = 0.70 and uk = 0.60. What is the acceleration of the system?
2.5 m/s/s
500
If I jump off a building with a horizontal velocity of 20 m/s and land 35 meters from the base of the building how high was the building?
15 meters
500

What is the current world record for hotdogs in 10 minutes at the Nathan's Famous Hotdog Eating contest?

74 hotdogs (by Joey Chestnut)