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6. For a given object and surface, is the coefficient of static friction (µs) greater than or less than the coefficient of kinetic friction (µk)?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
If a rock has a mass of 55 grams on Mars, how much will it weigh on earth?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
A tractor pulls a 225-kg bale of hay with a force of 4,233 Newtons. If the coefficients of friction are µs = 0.42 and µk = 0.30, how fast will the bale accelerate, provided that it is already moving?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
3. You find a measurement of 20 Newtons written in a laboratory notebook. Is this a measurement of weight or mass?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
What is Newton's first Law?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
A mover pushes a 235-pound crate across a driveway (µs = 0.42, µk = 0.24). Assuming that the mover has already gotten the crate moving, how much force must the mover push with in order to keep the crate moving at a constant velocity?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
What is Newton's 2nd law?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
2. A bicyclist is traveling at high speed and is not watching where he is going. His front tire catches in a sewer grating, causing the bike to stop almost instantly. This makes the rider fall off of the bike. Which way will the biker fall?
56.4 lbs
15.87
F=ma
An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force.
Foward over the bike
.539 N
Greater Than
weight
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