Class 11 Physics · Chapter 3 · Test 2
Centripetal Force and Satellites
35 MCQs This test covers centripetal force and acceleration, vertical and horizontal circular motion, banking, and applications such as the centrifuge, dryer and cream separator. It also covers artificial satellites, orbital velocity and period, weightlessness, and artificial gravity with numerical applications.
35 questions · 30 min · 35 marks
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Sample questions
The first 5 of 35. Try each one, then tap to see the answer.
Question 1
A force that keeps a body moving in a circle acts:
- Aalong the tangent
- Btowards the centre
- Caway from the centre
- Dalong the axis
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Answer: B
The centripetal (centre seeking) force is radial and points towards the centre.
Question 2
The centripetal force on a body in circular motion is ____ to its velocity.
- Aparallel
- Bopposite
- Cperpendicular
- Dat 45°
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Answer: C
The force acts along the radius while the velocity is along the tangent so they are perpendicular.
Question 3
If the string whirling a ball in a horizontal circle suddenly snaps the ball moves:
- Ain a circle
- Balong a radial outward line
- Cin a spiral
- Din a straight line along the tangent
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Answer: D
With no force the ball continues in the direction of its velocity which is tangential.
Question 4
The magnitude of the centripetal force is:
- Amv²/r
- Bmv/r
- Cmr²/v
- Dm²v/r
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Answer: A
F = ma and the centripetal acceleration is v²/r.
Question 5
Centripetal acceleration is given by:
- Av/r
- Bv²/r
- Cvr
- Dr/v²
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Answer: B
a = v²/r is directed towards the centre of the circle.
More tests in Circular and Rotational Motion
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