Physics Test 5 Review

Question 1

Which one these is not a fundamental force ?

Accepted Answer

buoyant force

Question 2

Define the 2nd law mathematically.

Accepted Answer

F= ma

Question 3

What are the characteristics of noncontact forces?

Accepted Answer

all of the above

Question 4

Vector or Scalar: Force

Accepted Answer

Vector

Question 5

Write the FORMULA for displacement:

Accepted Answer

D = Xf -Xi

Question 6

Define trajectory.

Accepted Answer

The path of a projectile

Question 7

_________ is a force that causes motion to change.

Accepted Answer

Friction

Question 8

A moving object does not require a continuous push to maintain a constant

Accepted Answer

velocity

Question 9

Define Newton’s 2nd Law of Motion.

Accepted Answer

all of the above

Question 10

Positions, displacements, velocities, and accelerations are all ________ quantities in two dimensions.

Accepted Answer

vector

Question 11

Newton was the first person to assert the concept of inertia.

Accepted Answer

False

Question 12

Acceleration can be calculated by?

Accepted Answer

Dividing a resultant force by mass

Question 13

If all external forces on a system are balanced, then its velocity remains __________ ; the acceleration is _______.

Accepted Answer

velocity remains constant; the acceleration is zero

Question 14

Vector or Scalar: Pi (3.14….)

Accepted Answer

Scalar

Question 15

Forces can only occur in pairs.

Accepted Answer

True

Question 16

What is a system?

Accepted Answer

inside an imaginary boundary, isolated from surroundings

Question 17

Define weight.

Accepted Answer

The force of gravity acting on an object

Question 18

How did Galileo describe motion?

Accepted Answer

Workable theories of dynamics, inertia

Question 19

Define Ad hoc.

Accepted Answer

a hypothesis based on conjecture rather than observation

Question 20

Vector or Scalar: Change in velocity

Accepted Answer

Vector

Question 21

Define contact forces.

Accepted Answer

transmitted only by physical contact between objects

Question 22

When you push on a heavy, immovable boulder, the boulder also pushes on you.

Accepted Answer

third law

Question 23

When you pull a glazed sheet of paper from underneath a neatly stacked pile of coins, the coins remain stacked afterward

Accepted Answer

First Law

Question 24

Without unbalanced forces, objects tend to move in ________ lines.

Accepted Answer

Straight

Question 25

Define force.

Accepted Answer

All of the above

Question 26

Vector or Scalar: Acceleration

Accepted Answer

Vector

Question 27

Newton’s laws of motion are the basis for the area of physics known as?

Accepted Answer

Dynamics

Question 28

Scientific Laws hold in every case in which they are tested.

Accepted Answer

True

Question 29

Weight is ________ proportional to mass.

Accepted Answer

Directly

Question 30

Which of the following is not a mechanical force: tension, compression, shear, or gravity

Accepted Answer

Gravity

Question 31

In the absence of air resistance, all objects fall at the same rate.

Accepted Answer

True

Question 32

Newton’s first law of motion predicts that without unbalanced forces, moving objects will travel in straight lines.

Accepted Answer

True

Question 33

Acceleration is change in?

Accepted Answer

Velocity

Question 34

Who inductively suggested the idea of inertia?

Accepted Answer

Gaileo

Question 35

Vector or Scalar: Instantaneous speed

Accepted Answer

Scalar

Question 36

The primary mechanical force transmitted through a tug-of-war rope is ?

Accepted Answer

tension

Question 37

The force that acts with one or more other forces to produce mechanical equilibrium?

Accepted Answer

Equilibrant

Question 38

Write the FORMULA for speed:

Accepted Answer

s= d/t

Question 39

Forces are

Accepted Answer

Vectors

Question 40

What are the contact forces?

Accepted Answer

tensile, compressive, torsion, friction, shear

Question 41

Vector or Scalar: Distance traveled

Accepted Answer

Scalar

Question 42

Write the FORMULA for velocity:

Accepted Answer

change in displacement/change in time

Question 43

If all forces acting on a system are unbalanced then a nonzero resultant force exists and the velocity changes causing?

Accepted Answer

Acceleration

Question 44

Vector or Scalar: Average velocity

Accepted Answer

Vector

Question 45

A child sliding down a slide is an example of a system on which is _____________.

Accepted Answer

Unbalanced

Question 46

Weight is also a ________ pointing straight downward.

Accepted Answer

vector

Question 47

Under ideal conditions, an object needs a continuous push to maintain a constant velocity.

Accepted Answer

False

Question 48

Vector or Scalar: Change in time

Accepted Answer

Scalar

Question 49

What is the 1st law of motion?

Accepted Answer

law of inertia

Question 50

What theory of Galileo was later verified by astronauts on the moon?

Accepted Answer

The rate at which an object falls is not proportional to its size or mass.

Question 51

Define inertia.

Accepted Answer

the “natural” state of motion of an object

Question 52

Vector or Scalar: Pressure

Accepted Answer

Scalar

Question 53

The weight of an object on Pluto is the same as its weight on Earth.

Accepted Answer

False

Question 54

The kick from the firing of a high-powered rifle illustrates which of Newton’s Laws?

Accepted Answer

third law

Question 55

Force always causes a change in motion.

Accepted Answer

True

Question 56

Vector or Scalar: Change in position

Accepted Answer

Vector

Question 57

A triple beam balance measures the weight of an object.

Accepted Answer

False

Question 58

What is kinematics?

Accepted Answer

Description of motion

Question 59

Vector or Scalar: Displacement

Accepted Answer

Vector

Question 60

Acceleration may involve a change in

Accepted Answer

all of the above

Question 61

Who was Isaac Newton?

Accepted Answer

Scientist who wrote Principia, and developed the laws of motion

Question 62

What is an equilibrant force?

Accepted Answer

A force that balances one or more other concurrent forces

Question 63

The SI unit of force?

Accepted Answer

Newton

Question 64

Define the 3rd law of motion.

Accepted Answer

For every action there is an equal and opposite reaction

Physics Test 5 Review

Questions 67

Physics Test 5 Review

Questions 67