PS Topic 3.2c Eval – Machines & Mechanical Advantage
PS Topic 3.2c Eval – Machines & Mechanical Advantage
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- Question 1 of 15
1. Question
1 point(s)How does a single fixed pulley, like the one seen here, help you do work?
- Question 2 of 15
2. Question
1 point(s)Barbie sits on one end of a see-saw and Ken sits on the other. Barbie goes up in the air and Ken stays down on the ground. In order for Ken to make Barbie move down, he should
- Question 3 of 15
3. Question
1 point(s)Mechanical advantage is a measure of how much a machine multiplies the input
- Question 4 of 15
4. Question
1 point(s)Calculate the amount of work done if you use a 100N force to push a 50 kg box 5 m across the kitchen floor.
- Question 5 of 15
5. Question
1 point(s)What is the primary mechanical advantage of using the simple machine seen in the image?
- Question 6 of 15
6. Question
1 point(s)Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
- Question 7 of 15
7. Question
1 point(s)Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
- Question 8 of 15
8. Question
1 point(s)What is the mechanical advantage of the block and tackle used to lift the bale of cotton?
- Question 9 of 15
9. Question
1 point(s)To lift a load off the ground, the force required is equal to the weight of the load. In case of a lever, however, a small effort force can be used to lift a much heavier load. How is this possible?
- Question 10 of 15
10. Question
1 point(s)This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?
- Question 11 of 15
11. Question
1 point(s)What is the primary mechanical advantage of using the simple machine seen in the image?
- Question 12 of 15
12. Question
1 point(s)Lifting a bale of cotton is no easy task. Farmer Jones wanted to store the cotton in the loft of his barn but he could not budge the bale. He consulted the high school’s science teacher for help. She suggested a simple machine.
Farmer Jones’ options included an inclined plane, a fixed pulley, a block and tackle, and a lever. If he had to lift the bale of cotton to a height of fifteen feet, which would be the MOST practical solution?
- Question 13 of 15
13. Question
1 point(s)A sales clerk at a local hardware store sells you a hammer with a mechanical advantage of 10 when used to pry up nails. You are able to create a force of 60 N. Using the hammer, what would be the maximum force that could be generated to remove a nail?
- Question 14 of 15
14. Question
1 point(s)This pulley
- Question 15 of 15
15. Question
1 point(s)Jonathan must lift a 3000N rock using a lever. Jonathan uses 300N of force to push down on the lever to move the rock. What is the ratio of the load to effort in this case?
