Simple machines Quiz 1

Question 1

What tools can be used in order to attain or boost the speed of a pedal cycle?

Accepted Answer

Gears

Answer

Pulley

Answer

Lever

Answer

Jack

Question 2

What is that main thing that hinders the 100% productivity of a working engine?

Accepted Answer

Friction

Answer

Quality of machine

Answer

Efficiency

Answer

Input force

Question 3

Assume that you are opening a bottle of ketchup and to unfasten it you apply a force of $$47\,N$$. While unfastening the bottle, you experience a force of $$675\,N$$ on the bottle lid. Find the mechanical advantage of the un-fastener.

Accepted Answer

$$14.37\,N$$

Answer

$$12.37\,N$$

Answer

$$10.37\,N$$

Answer

$$15.37\,N$$

Question 4

The effectiveness of a pulley comes out to be $$75\%$$ when the peasants haul a heavy box that requires $$12000\,J$$ of work. What will be the work done by the peasants to haul this box, in kilo-calories?

Accepted Answer

$$3.824\,kcal$$

Answer

$$3.016\,kcal$$

Answer

$$16000\,kcal$$

Answer

$$4.016\,kcal$$

Question 5

A two-ring pulley system is shown in the diagram, where one carries freight and other produces effort. Now, assuming the efficacy of the system to be 100%, what will be the mechanical power of the ring pulley?<img  src="https://cmds-vedantu.s3.ap-southeast-1.amazonaws.com/prod/question-sets/c5d1a072-db27-4283-9fc8-e62d169437041598485015178823394.png"/>

Accepted Answer

2

Answer

4

Answer

3

Answer

1