MCQ
A couple is acting on a two particle systems. The resultant motion will be:
- APurely rotational motion.
- BPurely linear motion.
- CBoth A and B.
- DNone of these.
✓
Answer
- Purely rotational motion.
Explanation:
A couple consists of two equal and opposite forces whose lines of action are parallel and laterally separated by the some distance.
Therefore, net force (or resultant) of a couple is null vector, hence there is no translational acceleration, only rotational motion will be there.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A string of length $L$ and mass $M$ hangs freely from a fixed point. Then the velocity of transverse waves along the string at a distance $x$ from the free end is
→A block '$A$' takes $2\,s$ to slide down a frictionless incline of $30^{\circ}$ and length ' $l$ ', kept inside a lift going up with uniform velocity ' $v$ '. If the incline is changed to $45^{\circ}$, the time taken by the block, to slide down the incline, will be approximately $........\,s$
→If a glass prism is dipped in water, its dispersive power:
- Increases.
- Decreases.
- Does not change.
- May increase or decrease depending on whether the angle of the prism is less than or greater than 60°.
Mass m1 moves on a slope making an angle $\theta$ with the horizontal and is attached to mass m2 by a string passing over a frictionless pulley as shown in The co-efficient of friction between m1 and the sloping surface is $\mu$.
Which of the following statements are true?
→Which of the following statements are true?
- If m2 > m1 $\sin\theta,$ the body will move up the plane.
- If m2 > m1 $(\sin\theta+\mu\cos\theta),$ the body will move up the plane.
- If m2 < m1 $(\sin\theta+\mu\cos\theta),$ the body will move up the plane.
- If m2 < m1 $(\sin\theta-\mu\cos\theta),$ the body will move down the plane.
If the angular speed of the earth is doubled, the value of acceleration due to gravity (g) at the north pole
A body is thrown with a velocity of 10ms-1 at an angle of 60° with the horizontal. Its velocity at the highest point is:
Ploughing help to retain water by soil ...........
A particle at the end of a spring executes simple harmonic motion with a period ${t_1}$, while the corresponding period for another spring is ${t_2}$. If the period of oscillation with the two springs in series is $T$, then
→Boyle’s law is applicable for an:
- Diabatic process.
- Isothermal process.
- Isobaric process.
- Isochoric process.
A thermodynamic cycle takes in heat energy at a high temperature and rejects energy at a lower temperature. If the amount of energy rejected at the low temperature is $3$ times the amount of work done by the cycle, the efficiency of the cycle is
→