NCERT Class 9 Science-Force and Laws of Motion[Laws of Motion] [NCERT Based General Studies (GS)]: Questions 1 - 5 of 21
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Question 1
Question MCQ▾
Why automobiles are fitted with shockers?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | To reduce jerks while passing over a rough road | |
b. | Increase the rate of change of momentum | |
c. | Both a. and b. are correct | |
d. | None of the above | |
Question 2
Question MCQ▾
Recoil of a gun, working principle of a jet plane is based on:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Third law of motion | |
b. | First law of motion | |
c. | Second law of motion | |
d. | None of the above | |
Question 3
Question MCQ▾
Why passengers fall backward when a bus or car suddenly starts moving forward?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Due to inertia of motion | |
b. | Due to inertia of rest | |
c. | Due to inertia | |
d. | None of the above | |
Question 4
Question MCQ▾
Why dust particles come out of a carpet when it beaten with a stick:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Because of inertia of rest | |
b. | Because of inertia of motion | |
c. | Because of inertia | |
d. | All of the above | |
Question 5
Question MCQ▾
Examples of inertia of direction are:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | The rotating wheel of a bicycle or a motorcycle passing through a muddy stretch throws out mud tangentially | |
b. | When a fast moving bus or car negotiates a curve on the road passengers of the bus or car experience an outward push. | |
c. | Sparks produced during sharpening of a knife or blade of scissors against a grinding wheel | |
d. | All a., b. and c. are correct | |