Module 5 PHYSICS: Question Preview (ID: 27722)


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A person is pushing on a 327-pound rock. What frictional force must he overcome to get the rock moving? (µs = 0.32, µk = 0.20)
a) 1025.5 N b) 104.64 N c) d)
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?
a) .30 b) 661.5 c) 2205 d) 15.87
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?
a) 552.72 lbs b) 56.4 lbs c) .564 lbs d) 55.27 lbs
If a rock has a mass of 55 grams on Mars, how much will it weigh on earth?
a) .539 N b) 539 N c) 5.39 N d)
An object has a mass of 22 grams. What is its weight?
a) 215.6 N b) 2.15 N c) .216 N d)
A rocket ship weighs 20,501 Newtons on Jupiter. How much will it weigh on earth? (The acceleration due to gravity on Jupiter is 23.2 m/sec2.)
a) 200,909 Newtons b) 20.9 Newtons c) 8,660.3 Newtons d)
Assuming that there is no friction, how much force is necessary to accelerate a 235 gram object at 1.33 m/sec2?
a) 313 N b) .3 N c) 177 N d) .2 N
3. You find a measurement of 22 kg written in a laboratory notebook. Is this a measurement of weight or mass?
a) weight b) mass c) d)
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)?
a) Greater Than b) Less than c) d)
3. You find a measurement of 20 Newtons written in a laboratory notebook. Is this a measurement of weight or mass?
a) weight b) mass c) d)
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?
a) Foward over the bike b) Backwards c) To the left d) To the right
What is Newton's 3rd law?
a) Every action has an equal and opposite reaction b) F=ma c) An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force. d)
What is Newton's first Law?
a) Every action has an equal and opposite reaction b) F=ma c) An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force. d)
What is Newton's 2nd law?
a) Every action has an equal and opposite reaction b) F=ma c) An object in motion (or at rest) tends to stay in motion (or at rest) unless acted uon by an outside force. d)
While driving down a country road, a man has to stop because a 225-pound rock has fallen off of a hill and has landed in the middle of the road (μs = 0.45, μk=0.32). What is the frictional force the man must overcome to get the rock moving?
a) 101.25 lbs b) 3240 lbs c) d)
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