Free Printable Crazy Contraptions Topic test

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Crazy Contraptions Topic test

Total questions: 46

Worksheet time: 49mins

Name

Class

Date

Which type of force(s) will cause a change in an object's motion?

gravity

zero net force

balanced forces

unbalanced forces

A 20 kg bike accelerates at 10 m/s2. what was the force

25 Newtons

20 Newtons

200 Newtons

10 Newtons

8 N to the left , and 4 N to the right. Find the net force. Is this balanced ?

12 N Right No

4 N Left No

12 N Right Yes

4 N Left Yes

What is the acceleration of an object traveling at a constant velocity?

10 m/s²

0 m/s²

250 m/s²

20 m/s²

Name the missing force....

weight force

normal force

frictional force

tension force

Name the missing force...

frictional force

weight force

thrust

buoyant force

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

Is the car

Stationary

Moving at constant speed

Accelerating

Decelerating

A downward-moving skydiver who has just opened the parachute is slowing down.

10.

Calculate the net force

25N

11.

What force is equal to the normal force from the wall acting on the ladder?

Friction from the floor

Normal force from the floor

Friction from the wall

Weight of the ladder

12.

Which way is the object moving?

it's either not moving or moving at a constant speed due to balanced forces

to the right

to the bottom

13.

What is the NET FORCE of this diagram?

17 N, right

17 N, left

23 N, right

12 N, up

14.

The forces represented by the arrows in the diagrams are applied to the four objects that are at rest on a table. Which object is most likely to move to the right?

Object W

Object X

Object Y

Object Z

15.

If the mower in this image has a mass of 400kg, what net force will it have down this slope?

3920N

1960N

3395N

200N

16.

Imagine a bat swinging with a force of 1200 N, hitting a ball pitched with a force of 400 N. At what net force does the ball move away from the bat?

1600 N

800 N

400 N

Net force of 0 N

17.

A 2.2kg block of wood is at rest on a ramp with a 20 degree slope. What is the magnitude of Normal Force acting on the block?

7.85N

20.3N

7.37N

21.5N

18.

Draw a free body diagram showing all the forces acting on a dynamic cart as it goes down a slope at 30 degrees.

19.

This baseball pitcher is demonstrating which type of lever at the shoulder?

1st class

2nd class

3rd class

4th class

20.

A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?

7.5 Nm

1.5 Nm

750 Nm

150 Nm

21.

A 800N man is playing on a seesaw with son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw?

0.75m

1.5m

22.

Does a bridge anchored resting on two pillars have any torque?

No, it isn't moving

Yes, but it is at equilibrium

Yes, but it will soon break because of the torque

No, Bridges can't have torque

23.

In the diagram above, two masses, one with mass m, the other with mass M = 2m are resting on a uniform plank of length L that pivots at its midpoint. If the mass m is at the far end of the plank, how far away from the pivot should the mass M be to balance the plank in a horizontal position shown?

L/2

L/3

L/4

L/6

24.

If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, what minimum perpendicular force must be exerted by a mechanic at the end of a 45.0 cm wrench to loosen the nut?

.666 Nm

133.3 N

66.7 N

13.3 Nm

25.

Find the magnitude of the torque produced by a 5.0 N force applied to a door at a perpendicular distance of 65 cm from the hinge.

75 Nm

3.25 Nm

6.3 Nm

8.75 Nm

26.

For a lever to be a first class lever the fulcrum needs to be ..

between the load and the effort

on one side and the load and effort on the other side

on the same side as the load arm.

27.

3. Which type of lever is this?

First Class Lever

Second Class Lever

Third Class Lever

28.

A uniform rod weighs 40 N and is 1.0 m long. It is hinged to a wall at the left end, and held in a horizontal position at the right end by a vertical string of negligible weight, as shown in the figure. What is the magnitude of the torque due to the string about a horizontal axis that passes through the hinge and is perpendicular to the rod? The hinge is very small with negligible friction.

5.0 N ∙ m

20 N ∙ m

10 N ∙ m

40 N ∙ m

29.

To determine the location of the center of mass (or center of gravity) of a car, the car is driven over a scale on a horizontal floor. When the front wheels are over the scale, the weight recorded by the scale is 5800 N, and when the rear wheels are over the scale, the scale reads 6500 N. The distance between the front and rear wheels is measured to be 3.20 m. How far behind the front wheels is the center of mass located?

1.69 m

0.845 m

1.72 m

1.50 m

30.

A mobile is shown in the figure. The horizontal supports have negligible mass. Assume that all the numbers given in the figure are accurate to two significant figures. What mass M is required to balance the mobile?

36 g

90 g

18 g

60 g

31.

When an object is experiencing a net torque

it is in dynamic equilibrium.

it is in static equilibrium.

it is rotating.

it is translating.

32.

What is the direction of the torque in the system due to post A?

clockwise

Counter clockwise

Neither Direction

Depends on the mass of the diver

33.

What is the distance the masses on the right of the fulcrum need to be to balance with the two masses on the left?

.65 m

.56 m

.79 m

.39 m

34.

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

8.5 J

45 J

7.5 J

22.5 J

35.

Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?

12,789 Joules

24,500 Joules

4,500 Joules

245,000 Joules

36.

A exercise ball is on a table 2.5 m above the ground. What is the mass of the ball if it has a GPE of 56.8 J?

71 kg

22.72 kg

142 kg

2.32 kg

37.

A 5 Kg body is having a Kinetic energy of 250 J. What is the velocity of the body?

10 m/s

15 m/s

20 m/s

40 m/s

38.

The roller coaster car begins at point W. At what point along the track will the car have the greatest amount of kinetic energy?

39.

Gravitational potential energy depends on the ________ and ________ of the object.

Height and mass

Friction and movement

Mass and Movement

Height and Friction

40.

What is the value of the Earth's acceleration due to gravity (g)?

9.8 m/s²

100 m/s²

25 m/s²

3.14 m/s²

41.

What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?

g = 9.8 m/s²

9.8 Joules

1.0 Joule

0.10 Joule

11.8 m/s²

42.

To solve a problem involving roller coasters like this one, which equation is useful?

KE = mgh

a = v/t

F = m a

-PE_g = KE

43.

What is the KE at point B?

14 J

12 J

6 J

8 J

44.

What is the Total Energy of the system?

14 J

12 J

6 J

8 J

45.

What is the Kinetic Energy at point B?

500,000 J

400,000 J

300,000 J

50,000 J

46.

A 3kg object is launched vertically upward from ground level with an initial speed of x. As it rises, it loses 1000 J of energy to air resistance before momentarily coming to rest at its maximum height. The object reaches a height of 20.0 meters. Calculate the objects initial velocity upon launch (x) . Show your working for this question.

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Crazy Contraptions Topic test

Total questions: 46

Worksheet time: 49mins

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