# 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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