Friction
This is the friction type of a moving object.
What is kinetic friction?
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.
What is 0.91?
You give a 10 kg cart a push of 200 Newtons. The cart has a rolling friction of 50 Newtons. This is the cart’s acceleration.
What is 15m/s^2?
A ___________ is a measurable physical quantity. (Hint: Square vs a cube)
What is a dimension?
If you are dragging an object south, the magnitude of the kinetic friction point will point in this cardinal direction.
What is north?
A block has a coefficient of kinetic friction of 0.8. The block has a mass of 100 kg. This is how hard you must push the block to keep it moving at a constant velocity.
What is 785 newtons?
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, this is the cart’s acceleration.
What is 6.5 m/s^2?
If a wheel has an angular speed of 2.5 radians/s, this will its speed be in rpm.
What is 23.9 rpm?
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.
What is b) the amount of surface area in contact?
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 this value.
What is 0.204?
A 10 kg block is on an incline of 45 degrees from the horizontal. For the system, us = 0.61 and uk = 0.50. Yes or no, the block will move.
What is yes?
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, this would my speed appear to be.
What is 36.05 m/s?
This type of friction has the strongest coefficient as opposed to the other (technically) two.
What is static friction?
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. Yes or no, he can push the crate.
What is no?
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.
What is 2.5 m/s^2?
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, this is the net force acting on the ship.
What is 1285.6 newtons?
The force that will actually cause a car to accelerate?
What is propelling force?
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. This is the acceleration of the crate.
What is 2.11 m/s^2?
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. This is the acceleration of the system.
What is 2.5 m/s^2?
If I jump off a building with a horizontal velocity of 20 m/s and land 35 meters from the base of the building. This is how high the building.
What is 15 meters?