Complete Physics Assessment

Get more physics practice and get that A. Take a 10 or 20 question physics full physics assessment randomized all questions in our test bank.

Use our equation sheet for guidance on the equations.

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10 Random Physics Questions from our Complete Test Bank

10 - Physics Questions

10 questions from our bank of first semester material

1 / 10

North is a

magnitude

direction

both magnitude and direction

A vector has a magnitude and a direction (15 meters north)

2 / 10

What is the magnitude of the resultant of 50 meters north and 72 meters west?

103 m

65 m

88 m

32 m

3 / 10

What is the east component of the vector above?

26 m/s

41 m/s

16 m/s

65 m/s

You are trying to find the adjacent and have an angle and the hypotenuse

4 / 10

How much work would you have done if you pushed on a 2100 kg car with a force of 210N that did not move?

0 J

10 J

3250 J

441000 J

W = Fd

You have to move the object in the direction of force to do work. No work is done if the object does not move.

5 / 10

What will happen to the centripetal force required to keep an object going in a circle if the mass of the object is doubled and the radius of the circle is cut in half?

It would become ___________ times the original.

half

one

two

four

6 / 10

How is the force of gravity related to distance between object?

directly

inversely

inversely squared

7 / 10

What is the magnitude of net force when 162 N of force is required to keep an object in constant motion?

0 n

10 N

16.2 N

162 N

Constant motion means no acceleration. Net force (sum of overall forces on an object) must be zero if there is no acceleration.

8 / 10

Which letter above represents the parallel force?

9 / 10

What it the unit of 15 meters north?

15 meters

15 meters north

meters

north

The unit defines what the 15 is. 15 what?

meters

10 / 10

What is your average velocity after going 10 meters east followed by 20 meters west in 10 seconds?

1 m/s east

1 m/s west

3 m/s east

3 m/s west

1 m/s

3 m/s

What is your velocity after going 10 meters east followed by 20 meters west in 10 seconds?
Velocity is a vector so direction matters so displacement divided by time. Make the directions into signs.
10 m east is +10
20 m west is -20
now calculate displacement and divide that by time ((+10)+(-20))/10
-10/10 = -1 m/s
turn the negative back into a direction 1 m/s west

Your score is

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20 Random Physics Questions from our Complete Test Bank

20 - Physics Questions

20 questions from our bank of first semester material

1 / 20

What is the change in momentum of an 85 kg person running at 8 m/s forward when hitting a wall and bouncing back at 3 m/s?

-935 kg∙m/s

435 kg∙m/s

-1251 kg∙m/s

894 kg∙m/s

2 / 20

20 degrees north is a

scalar

vector

A scalar has a magnitude only which includes a number and unit (15 meters)

A vector has a magnitude and a direction (15 meters north)

3 / 20

What is the west component of 30 meters per second at 20 degrees to the west of north?

10 m/s

16 m/s

6 m/s

26 m/s

4 / 20

What is the minimum magnitude of vector A and B in any arrangement?

Magnitude includes the number and a unit. Since no numbers are involved the length of the arrow represents the magnitude. The directions are pointing the same way but the lengths are different.

Maximum is B + A or A + B

5 / 20

Joe is attempting to lift a 3000 N motorcycle into a trailer 1.5 meters off the ground using a pulley system. If Joe applies 300 N of force, what is the ideal distance he would pull on his side of the rope?

0.0005 m

15 m

10 m

450

6 / 20

Which is a simple machine consisting of a bar or plank that turns around a pivot point?

lever

pulley

incline plane

7 / 20

Which would give the least torque if all forces applied at point A, B, C, and D were the same?

D's force is directed parallel to the lever, therefore produces no torque (no torque)

C's torque is the greatest distance and completely perpendicular (most torque)

A and B's torque is less than C but greater than D. Without knowing the angle for B or actual distance for A you can't determine which of these two is greater.

8 / 20

Which graph correctly shows how distance relates to force using the Law of Universal Gravitation?

Distance is in the denominator and squared in the universal gravitation equation below. There is a inverse squared relation. Force decreases not proportionately more early since the d is squared. If you double distance the force goes down to 1/4.

9 / 20

What will happen to the centripetal force required to keep an object going in a circle if mass, radius, and velocity are all doubled?

It would become ___________ times the original.

half

one

two

four

10 / 20

What would happen to the force of gravity if you doubled the mass of one object and doubled the distance?

double the force

one half the force

one fourth the force

nine times

11 / 20

What would happen to the force of gravity if you tripled the distance between the objects?

double the force

triple the force

one third the force

one ninth the force

12 / 20

What happens to the magnitude of force required to stretch a spring 0.1 m when the spring constant increases?

force must increase

force must decrease

force stays the same

13 / 20

What is the tension in each of two ropes vertically suspending a 45 kg object? (use g = 9.8 m/s/s)

45 kg

441 N

0.218 N

221 N

Tension if a single rope would have the equal magnitude to the weight down. With two ropes both directed up, they are sharing the weight so divide by two.

F_w = mg

F_w = (45)(9.8) = 441 N

441/2 = 220.5 N

14 / 20

Which of Newtons Laws are best represented by this scenario.

If you push on a wall with 50 N of force, the wall pushed on you with 50 N of force

Newton's First Law

Newton's Second Law

Newton's Third Law

Newtons First Law: Law of Inertia. An object at rest stays at rest and an object in motion stays in motion unless acted upon by an outside force. (More mass more inertia or resistance to change)

Newtons Second Law: Force causes acceleration (F=ma)

Newtons Third Law: All forces are paired, equal and opposite. When you push on an object with 15 Newtons of force it pushes back on you with 15 Newtons of force.

15 / 20

95kg Joe jumps off a 0.8kg skateboard and accelerates at 1.5 m/s/s right what is the acceleration of the skateboard?

98 m/s/s right

178 m/s/s left

114 m/s/s left

0.0126 m/s/s left

16 / 20

Which of Newton's Laws describes an objects resistance to a change in motion or rest?

Newton's First Law

Newton's Second Law

Newton's Third Law

Newtons First Law: Law of inertia

This is about a resistance to change in motion. An object at rest stays at rest and an object in motion stays in motion unless acted upon by an outside force.

17 / 20

Which 2D Vector drawing correctly describes the overall and components of South of East

18 / 20

One ball is thrown down at 5 m/s and another is thrown down at 10 m/s at the same time. How will the distance between them change as they fall.

the 10 m/s second ball will keep getting further away

the 5 m/s ball will be catching up with the 10 m/s ball

they will maintain the same distance apart during the fall

The ball thrown down will always be traveling faster as they both change by 9.8 m/s²down

Since traveling faster the ball thrown downwards will always be getting further ahead

An acceleration of 9.8 m/s²down means a rock thrown

5 m/s down will be going 14.8 m/s a second later (going 14.8 meters in a second - if that rate was maintained)
10 m/s down will be going 19.8 m/s a second later (going 19.8 meters in a second - if that rate was maintained)

The one going faster will always be faster and getting further away

19 / 20

A change in displacement over time is ______________.

displacement

velocity

acceleration

distance

v = (Δx)/t

The change in displacement over time is the definition of velocity. See the equation above

20 / 20

What it the direction of 15 meters north?