1.
Giovanni used the forklift to lift a pallet of red bricks 12 meters high.
Is this an example of work?
Correct Answer
A. YES
Explanation
Yes, this is an example of work because work is defined as the application of force over a distance. In this scenario, Giovanni applied force to lift the pallet of red bricks using the forklift, and the bricks were lifted to a height of 12 meters. This required the expenditure of energy and the accomplishment of a task, which aligns with the concept of work.
2.
The formula to calculate work is W= F x d
How much work was done is 5 N of force was used to move an object 25 meters?
Correct Answer
B. 125 Joules
Explanation
The formula to calculate work is W = F x d, where W represents work, F represents force, and d represents distance. In this question, it is stated that 5 N of force was used to move an object 25 meters. Therefore, we can substitute F = 5 N and d = 25 meters into the formula. W = 5 N x 25 meters = 125 Joules. So, the correct answer is 125 Joules.
3.
The formula for calculating work = W= F x d
A vehicle at the wrecking yard was pushed forward 7 meters with a force of 5000 N. How much work was done?
Correct Answer
C. 35000 J
Explanation
The formula for calculating work is W = F x d, where W is the work done, F is the force applied, and d is the distance moved. In this case, the force applied is 5000 N and the distance moved is 7 meters. By substituting these values into the formula, we get W = 5000 N x 7 m = 35000 J. Therefore, the amount of work done is 35000 J.
4.
The formula for calculating work is F x d
A family car ran out of gas in the left lane of a busy street. The father got out of the car and tried to push the car to the gas station. He used about 600 N of force, but the car moved a distance of 0. How much work was done?
Correct Answer
D. 0 J
Explanation
Work is calculated by multiplying the force applied by the distance moved in the direction of the force. In this scenario, the father applied a force of 600 N, but the car did not move any distance (0). Therefore, the work done is 0 J.
5.
The lifegaurd carried a young child to the nurse station. Is this an example of work?
Correct Answer
B. No
Explanation
The given scenario of a lifeguard carrying a young child to the nurse station does not necessarily indicate work. While it involves physical effort, work typically refers to the exertion of energy to accomplish a task or achieve a goal. In this case, the lifeguard's action is part of their duty and responsibility to ensure the safety and well-being of individuals at the pool, rather than a task with a specific objective. Therefore, it can be concluded that this scenario is not an example of work.
6.
An object is moved forward when kicked. Is this an example of work?
Correct Answer
A. Yes
Explanation
Yes, this is an example of work. Work is defined as the transfer of energy that occurs when a force is applied to an object and the object is displaced in the direction of the force. In this case, the force of the kick is applied to the object, causing it to move forward. Therefore, work is being done on the object.
7.
According to the definition for work, in order for work to be accomplished their must be a force exerted on an object and
Correct Answer
B. The object must move in the same direction as the applied force
Explanation
According to the definition of work, work is accomplished when a force is exerted on an object and the object moves in the same direction as the applied force. This means that the force and the displacement of the object are in the same direction. If the object moves in the opposite direction of the applied force, no work is done. Similarly, lifting the object up or moving a distance less than 100 meters are not necessary conditions for work to be accomplished. Therefore, the correct answer is that the object must move in the same direction as the applied force.
8.
The formula for calculating work is W= F x d
What do the letters W, F, and d represent in the formula?
Correct Answer
C. W= work, F= force, d= distance
Explanation
The correct answer is W= work, F= force, d= distance. In the formula for calculating work, W represents the amount of work done, F represents the force applied, and d represents the distance over which the force is applied.
9.
If a force is applied, but the object does not move a distance, is work being done on the object?
Correct Answer
B. No
Explanation
If a force is applied to an object but the object does not move a distance, work is not being done on the object. In order for work to be done, there must be a displacement of the object in the direction of the force. If there is no displacement, no work is done, regardless of the amount of force applied.
10.
The formula for calculating work is W= F x d
A pulley is used to lift a heavy piano 6 meters up to the second floor. The amount of force applied upward is 700 N. How much work was done?
Correct Answer
B. 4200 J
Explanation
Work is calculated by multiplying the force applied to an object by the distance over which the force is applied. In this case, the force applied upward is 700 N and the distance the piano is lifted is 6 meters. Therefore, the work done is equal to 700 N multiplied by 6 meters, which equals 4200 J (joules).
11.
A wrecking ball sways forward and knocks the wall down.
Is this an example of work?
Correct Answer
A. Yes
Explanation
Yes, this is an example of work. Work is defined as the transfer of energy that occurs when a force is applied to an object and causes it to move in the direction of the force. In this scenario, the wrecking ball exerts a force on the wall, causing it to move and ultimately be knocked down. Therefore, work is being done on the wall.
12.
The formula for calculating work is W= F x d
Jerry pulled the library cart 3 meters with a force of 17 N. How much work was done?
Correct Answer
A. 51 J
Explanation
To calculate work, we use the formula W = F x d, where W is the work done, F is the force applied, and d is the distance moved. In this case, Jerry pulled the library cart for 3 meters with a force of 17 N. Therefore, the work done can be calculated as W = 17 N x 3 m = 51 J.
13.
A student's wheelchair is pushed up the ramp and unto the school bus.
Is this an example of work?
Correct Answer
A. Yes
Explanation
Yes, this is an example of work because work is defined as the transfer of energy that occurs when a force is applied to an object and causes it to move in the direction of the force. In this scenario, the force applied to the wheelchair by pushing it up the ramp causes it to move onto the school bus, thus transferring energy and performing work.
14.
When measuring the distance an object moves when a force is applied, what tool would be best?
Correct Answer
B. Meter stick
Explanation
A meter stick would be the best tool for measuring the distance an object moves when a force is applied because it provides a linear measurement in meters. A spring scale is used to measure force, not distance. A stopwatch is used to measure time, not distance. A pulley or inclined plane can be used to change the direction or magnitude of a force, but they do not directly measure distance.
15.
The formula for calculating work is W= F x d.
A body builder lifts the barbell up 1 meter with a force of 501 N.
Then He uses 501 N to hold the barbell in place for 2 minutes.
How much work was done?
Correct Answer
B. 501 J
Explanation
The formula for calculating work is W = F x d, where W is the work done, F is the force applied, and d is the displacement. In this case, the body builder lifts the barbell up 1 meter with a force of 501 N. Therefore, the work done in lifting the barbell is 501 J (Joules). The second part of the question mentions that the body builder uses 501 N to hold the barbell in place for 2 minutes. However, since no displacement is mentioned, we can assume that no work is done in this scenario. Therefore, the total work done is 501 J.