You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Momentum

A force F i...

Question

A force $F$ is applied to a dumbbell for a time interval $t$ , first as in case (i) and then as in case (ii). In which case does the dumbbell acquire the greater centre of mass speed?

(i)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

(ii)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both cases have same COM speed

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

the answer depends on the rotational inertia of the dumbbell

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A Both cases have same COM speed
The motion of the COM is determined by the force acting on the system .
Since the applied force $F$ is same in both cases, there will not be any difference in the motion of the COM.

Suggest Corrections

Similar questions

Q. In both the cases, block & monkey are at the same horizontal level. In both the cases, monkey climbs the rope. In case-1 rope remains vertical & in case-2 rope swings during motion.

t_{1} & t_{2}

are times taken by monkeys to reach the pulley in case-1 & case-2 respectively. In both cases, monkey applies the same force on the rope.

Q. For the three dumbbells shown above, the rod connecting them has a negligible mass and has a length of

d

. The spheres shown in Dumbbell

1

and Dumbbell

2

have a uniform density of

ρ

and the spheres in Dumbbell

3

have a density of

2 ρ

. For which dumbbell is the center of mass furthest to the left?

(correct answer + 1, wrong answer - 0.25)

On applying a force F the point 'P' is displaced vertically downwards by y units from equilibrium position. Find the force F in terms of the force constant k of the spring and displacement y, for the cases (A) and (B), as shown in figure.

A force of 12 N is acting on a body and the same force 12 N is acting on the same body but in a different direction. If the body moves with a displacement of $^{'} d^{'}$ metres, then what is the work done?

Q. In both the cases, block & monkey are at the same horizontal level. In both the cases, monkey climbs the rope. In case-1 rope remains vertical & in case-2 rope swings during motion.

t_{1} & t_{2}

are times taken by monkeys to reach the pulley in case-1 & case-2 respectively. In both cases, monkey applies the same force on the rope.

Join BYJU'S Learning Program

A force F is applied to a dumbbell for a time interval t, first as in case (i) and then as in case (ii). In which case does the dumbbell acquire the greater centre of mass speed?

The correct option is A Both cases have same COM speedThe motion of the COM is determined by the force acting on the system .Since the applied force F is same in both cases, there will not be any difference in the motion of the COM.

A force $F$ is applied to a dumbbell for a time interval $t$ , first as in case (i) and then as in case (ii). In which case does the dumbbell acquire the greater centre of mass speed?

The correct option is A Both cases have same COM speed
The motion of the COM is determined by the force acting on the system .
Since the applied force $F$ is same in both cases, there will not be any difference in the motion of the COM.