Physics-Work and Machines [NSTSE (National Science Talent Search Exam- Unified Council) Class 6]: Questions 8 - 15 of 58

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Question 8

Question MCQ▾

Which is work as resistance in frictionless machine?

Choices

Choice (4)Response

a.

Effort

b.

Load

c.

All of the above

d.

None of the above

Edit

Question 9

Question MCQ▾

In case of simple machines, ________ is the force that we apply on a machine.

Choices

Choice (4)Response

a.

Friction

b.

Load

c.

Effort

d.

All of the above

Edit

Question 10

Question MCQ▾

With the help of simple machines, the weight we lifted or dragged is called:

Choices

Choice (4)Response

a.

Friction

b.

Load

c.

Effort

d.

All of the above

Edit

Question 11

Question MCQ▾

Which of the following is not example of simple machine?

Choices

Choice (4)Response

a.

Seesaw

b.

Scissors

c.

Pulley

d.

Crowbar

Edit

Question 12

Question MCQ▾

How many types of Lever are we used?

Choices

Choice (4)Response

a.

Four

b.

Three

c.

Six

d.

Two

Edit

Question 13

Question MCQ▾

If the mechanical advantage of a device is 20 and load is 1000 N the effort will be:

Choices

Choice (4)Response

a.

500 N

b.

5 N

c.

5000 N

d.

50 N

Edit

Question 14

Question MCQ▾

The efficiency of an ideal machine is:

Choices

Choice (4)Response

a.

100%

b.

80%

c.

90%

d.

92%

Edit

Question 15

Question MCQ▾

In which of the following class of lever fulcrum is in middle?

Choices

Choice (4)Response

a.

Class III

b.

Not Mentioned

c.

Class II

d.

Class I

Edit