Deck 10: Force and Force-Related Parameters

Question 1

One Newton is equal to

Answer 1

A

Question 2

Over the elastic range, the deformation of a spring is directly proportional to

A)the amount of stretch
B)the amount of compression
C)the applied force
D)the spring constant

Answer 2

C

Question 3

A f

Answer 3

D

Question 4

Forces always come in pairs, equal in magnitude and opposite in direction.

Question 5

Unlike many other vector quantities, which are defined by their magnitude and direction, force is also defined by its

A)color
B)duration
C)length
D)point of application

Question 6

Which of the following statements best describes what weight is?

A)Weight is the amount of mass something has.
B)Weight is resistance to acceleration.
C)Weight is a force due to gravity acting on a mass.
D)Weight describes how massive something is.

Question 7

All forces result from direct contact.

Question 8

Which of the following is the SI unit for force?

A)Pounds
B)Newtons
C)Grams
D)Kilograms

Question 9

The physical quantity of force has

A)magnitude only.
B)direction only
C)both magnitude and direction
D)neither magnitude nor direction

Question 10

A satellite orbits the earth instead of flying off into space because

A)rocket thrusters continuously push it towards the earth.
B)solar reflectors continuously push it towards the earth.
C)wind sails continuously push it towards the earth.
D)gravity continuously pulls it towards the earth.

Question 11

Force is a fundamental dimension.

Question 12

The physical quantity of force is a vector quantity (has direction).

Question 13

Forces tend to do what to objects upon which they act?

A)move them
B)rotate them
C)elongate them
D)all of the above

Question 14

A single force can exist all by itself.

Question 15

The value of the spring constant depends on

A)the type of material used to make the spring.
B)the shape and winding of the spring.
C)All of the above
D)None of the above, that's why it's called a "constant."

Question 16

If you drop your textbook it falls because the earth pulls it downward.At the same time, your textbook pulls on the earth with a force that is

A)equal to the downward pull on the textbook and in the same direction.
B)equal to the downward pull on the textbook but in the opposite direction.
C)immeasurably small.
D)zero.

Question 17

If you push sideways gently on your textbook and it doesn't move, it is most likely because

A)the book's mass is large enough to resist your push.
B)your push is too small to overcome the book's inertia.
C)friction is pushing on the book in the opposite direction as your push.
D)none of the above

Question 18

W

Question 19

Question 20

A force that will accelerate 1000 kg of mass at a rate of 9 kmph/s is equal to

A)2500 N
B)250 kN
C)1 ton
D)1 metric ton

Question 21

If you push on your textbook so that it slides across the table at a constant velocity,

A)there must not be any forces acting on the book, otherwise it would accelerate.
B)all of the forces acting on the book must be balanced.
C)the book must be changing direction.
D)none of the above

Question 22

The quantity that represents a measure of how easily a given fluid can flow is known as

A)density
B)specific weight
C)viscosity
D)none of the above

Question 23

If you push on the wall with a force of 100 N, the wall pushes back on you with a force of 100 N.This is a basic description of

Question 24

If you drop your textbook, while it is falling it speeds up, therefore

A)there are no forces acting on the book.
B)all of the forces acting on the book are balanced.
C)the forces acting on the book are unbalanced.
D)none of the above

Question 25

What does W stand for in the following equation? $$W = m g$$

A)Weight
B)Work
C)Watts
D)none of the above

Question 26

The weight of an object is the force that is exerted on the mass of the object by the earth's
gravity.

Question 27

If an object is moving and there are no unbalanced forces acting on it, the object will

A)speed up.
B)slow down.
C)continue moving at constant velocity.
D)none of the above

Question 28

Objects at rest tend to remain at rest and objects in motion tend to remain in motion, unless acted upon by an unbalanced external force.This is a basic description of

Question 29

In general, the viscosity of gases increases with increasing temperature.

Question 30

If an object is at rest and there are no unbalanced forces acting on it, the object will

A)speed up.
B)slow down.
C)remain at rest.
D)none of the above

Question 31

What does G stand for in the following equation? $$F = \frac { G m _ { 1 } m _ { 2 } } { r ^ { 2 } }$$

A)Gravity
B)Universal gravitational constant
C)Liters
D)Weight

Question 32

A force tends to cause an object to accelerate.The force and the resulting acceleration have

A)the same direction.
B)different directions.
C)no relationship between their directions.
D)none of the above

Question 33

What does r stand for in the following equation? $$F = \frac { G m _ { 1 } m _ { 2 } } { r ^ { 2 } }$$

A)Radius of the earth
B)Universal gravitational constant
C)Resistance
D)Center-to-center distance between objects

Question 34

In general, the viscosity of liquids increases with increasing temperature.

Question 35

What does g stand for in the following equation? $$W = m g$$

A)Weight
B)Gallons
C)Acceleration due to gravity
D)none of the above

Question 36

Weight and mass are essentially the same thing.

Question 37

What does F stand for in the following equation? $$F = \frac { G m _ { 1 } m _ { 2 } } { r ^ { 2 } }$$

A)Gravitational force
B)Friction
C)Viscous friction
D)Weight

Question 38

The acceleration of an object is directly proportional to the force that is causing the acceleration.This is a basic description of

Question 39

The property of a fluid that quantifies fluid friction is

A)coefficient of friction
B)coefficient of restitution
C)density
D)viscosity

Question 40

In his second law, Newton observed that force and acceleration are

A)inversely proportional
B)directly proportional
C)all of the above
D)none of the above

Question 41

A tow truck exerts a force of 2000 N on a car, causing it to accelerate at $2.5 \mathrm {~m} / \mathrm { s } ^ { 2 }$ What is the mass of the car?

A)80 kg
B)800 kg
C)2000 kg
D)5000 kg

Question 42

A "suction cup" sticks to the wall because it is

A)pulled to the wall by vacuum
B)pushed to the wall by the atmosphere
C)both of these
D)none of the above

Question 43

A car is driving down the road going 90 kmph when it collides head-on with a mosquito that is flying 5 kmph in the opposite direction.Which of the following statements is true as a result
Of the collision:

A)The car experiences the greater impact force.
B)The mosquito experiences the greater impact force.
C)The car experiences the greater acceleration.
D)The mosquito experiences the greater acceleration.

Question 44

Calculate the torque produced by a 50N perpendicular force at the end of a -long wrench.

Question 45

Identify the force that accelerates a car:

A)the car pushing on the road
B)the road pushing on the car
C)the engine pushing on the wheels
D)the wheels pushing on the engine

Question 46

Identify the force that propels a rocket through the vacuum of outer space: the rocket pushing on air.

A)the rocket pushing on air
B)air pushing on the rocket
C)the rocket pushing on a distant planet
D)expanding gases pushing on the rocket

Question 47

If a small sports car collides head-on with a massive truck, which vehicle experiences the
greater impact force? Which vehicle experiences the greater acceleration due to the impact?

Question 48

What is the SI unit for pressure?

Question 49

A "teeter-totter" (or "see-saw" if you prefer) has a 200 N child sitting at one end, 3 m from the center pivot point (fulcrum).How far from the center point should a 500 N adult sit in order
To balance the teeter-totter?

Question 50

A force acting on an object tends to produce

A)mass
B)speed
C)acceleration
D)rotation

Question 51

A tow truck exerts a force of 2000 N on a car, causing it to accelerate at $4 \mathrm {~m} / \mathrm { s } ^ { 2 }$ .What is the mass of the car?

A)500kg
B)750kg
C)1000kg
D)1500kg
E)None of the above

Question 52

Pressure is a fundamental dimension.