Laws of Motion-Force and Inertia [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 6 - 9 of 102
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Question 6
Question MCQ▾
A 5 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 150 N will be –
Choices
Choice (4) | Response | |
---|---|---|
a. | 101 m/s | |
b. | 36.5 m/s | |
c. | 64 m/s | |
d. | 3.18 m/s |
Question 7
Question MCQ▾
The string of a pendulum is horizontal. The mass of the bob is m. Now the string is released. The tension in the string in the lowest position is –
Choices
Choice (4) | Response | |
---|---|---|
a. | 2 mg | |
b. | 1 mg | |
c. | 3 mg | |
d. | 4 mg |
Question 8
Question MCQ▾
A stone of mass 1 kg tied to a light inextensible string of length L = m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the suing is 4 and if g is taken to be 10m/sec2 , the speed of the stone at the highest point of the circle is
Choices
Choice (4) | Response | |
---|---|---|
a. | m/sec | |
b. | 7.07 m/sec | |
c. | 20 m/sec | |
d. | m/sec |
Question 9
Question MCQ▾
A swimmer can swim in still water at a rate 4 km/h. If he swims in a river flowing at 3 km/h and keeps his direction (w. r. t. water) perpendicular to the current. Find his velocity w. r. t. the ground.
Choices
Choice (4) | Response | |
---|---|---|
a. | 3 km/hr | |
b. | 4 km/hr | |
c. | 7 km/hr | |
d. | 5 km/hr |