# Instantaneous Force and Impulse

## Trending Questions

**Q.**a particle of mass m is projected with velocity v making angle 45 with horizontal when the paetivle lands on the level of ground the magnitude of the change in its momentum will be

**Q.**Q. If the momentum of body increased by 20% then K.E increases by?

**Q.**A batsman deflects a ball by an angle of 45° without changing its initial speed which is equal to 54 km/h. What is the impulse imparted to the ball ? (Mass of the ball is 0.15 kg.)

**Q.**

A weight lifter lifts 300 kg from the ground to a height of 2 meter in 3 second. The average power generated by him is

5880

*watt*4410

*watt*2205

*watt*1960

*watt*

**Q.**83.When momentum of a body increase by 200% its KE increase by

**Q.**Two billiard balls each of mass 0.05 kg moving in opposite directions with speed 6 m s¯¹, collide and rebound with the same speed. What is the impulse imparted to each ball due to the other ?

**Q.**two bodies A amd B of mass 5kg and 10 kg in contact with each other rest on a table against a rigid wall. the coefficient of friction between the bodies and the table is 0.2. when the force of 200 N is applied horizontally on A. which of the following is correct ?? 1. the reaction of wall is 200 N 2. the action reaction force between a and B is more that the reaction of wall 3. the action and reaction force betwen A amd B is less than reaction at wall 4. both 1 and 3 are correct explain each

**Q.**Position time graph for a particle of mass 1kg moving along x axis is shown in figure . Find impulse on particle at t =4s

**Q.**A particle of mass m is being circulated on a vertical circle of radius r. If the speed of particle at the highest point be v, then A : mg=mv2r B : mg>mv2r C : mg≤ mv2r D : mg≥ mv2r

**Q.**Position time graph of a body of mass 5 kg isgiven in the diagram. The impulse on body att = 3 s, is(u)x1812-1 2 34 5(s))(2) -30i kg m s(1) 30i kg m s-1-1(3) 6/ kg m s-1

**Q.**If U(xyz) = (xy+yz+zx), then, find force act on particle at point(1m, -1m, 2m)

**Q.**a ball of mass 0.1kg makes an elastic head on collision with the ball of unknown mass initially at rest. if the 0.1kg ball rebounds at one third of its original speed, what is the mass of the other ball?

**Q.**The moment of force f is equal to 4 ICAP + 5 j cap - 6 k cap at 2, 0, -3 about the point 2, - 2, - 2 is given by bhai

**Q.**A particle of mass 1 kg is fired with velocity 50m/s at an angle of 60 degree from horizontal.It is acted by viscous force of 0.2v during its journey .The horizontal distance travelled by it in first 10seconds is a)90 b)108m c)125m d)213m

**Q.**A saucer of mass 10 g is kept floating in air with the help of bullets, each of mass halfof the saucer, fired at same velocity at the rate of 10 bullets per second. If the bullets rebound with same speed in opposite direction then elocity of bullet at the time of impact is

**Q.**A bullet of mass 0.25 kg is fired with velocity 302 m/s into a block of wood of mass m1=37.5kg.It gets embedded into it.The block m1 is resting on a long block m2 and the horizontal surface on which it is placed is smooth.The coefficient of friction betweeen m1 and m2 is 0.5.Find the displacement of m1 on m2 and the common velocity of m1 and m2.Mass m2=1.25kg.

**Q.**A train of mass 107 kg is running on level road with a uniform speed of 72 km/hr. The frictional force is 0.25 N per 100 kg. The power of engine is

**Q.**

A mass of 10 kg is moving with constant velocity 0.5 m/s parallel to x-axis. The shortest distance of the mass from the origin during its motion is 20 cm. What will be the angular momentum of the mass about the origin in SI unit?

1

0.5

0.1

zero

**Q.**

A force of 50 dynes is acted on a body of mass 5 g which is at rest for an interval of 3 seconds, then impulse is

0.15×10−3N−s

0.98×10−3N−s

1.5×10−3N−s

2.5×10−3N−s

**Q.**188. A rod of mass m and length 2R is fixed along the diameter of the ring of same mass m and radius R .The combined body is rolling without slipping along x-axis. Then the angular momentum about z ais having magnitude equal to

**Q.**Is impulse a scalar or vector quantity ? Write its S.I. unit ?

**Q.**A rain drop of radius 2mm falls from a height of 500m above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed and moves with uniform speed there after. What is the work done by the gravitational force on the drop in the first and second half of its journey ? What is the work done by the resistive force in the entire journey if its speed on touching the ground is 10ms−1

**Q.**A tiny ball of mass m is initially at rest atheight H above a cake of uniform thickness h.At some moment the particle falls freely, touches the cake surface and then penetratesin it at such a constant rate that its speedbecomes zero on just reaching the ground(bottom of the cake). Speed of the ball at theinstant it touches the cake surface and itsretardation inside the cake are respectively

**Q.**two objects attract each other by a force F . what will happen if the mass of bo

**Q.**18.Position time graph for a particle of mass 6kg moving along x axis is shown In the figure then impulse on the particle at t=2sec is

**Q.**

Four billiards balls, each of mass 0.5 kg, all are travelling in the same direction on a billiard table, with speeds of 2 m/s, 4 m/s, 8 m/s and 10 m/s. What is the linear momentum of this system?

10 kg-m/s

5 kg-m/s

12 kg-m/s

2 kg-m/s

**Q.**Pick out the only vector quantity in the following list:

**Q.**Force acting on a body varies with time as shown below.If initial momentum of the body is p, then the timetaken by the body to retain its momentum p again is(in N)4.2(1) 8 s(3) 6 st (sec)(2) (4+2/2)s(4) Can never obtain

**Q.**magnus effect

**Q.**The magnitude of the force (in N) acting on a body varies with time t (in μs) as shown. AB, BC and CD are straight line segments. The magnitude of the total impule of the force on the body from t=4 μs to t=16 μs is

- 5×10−3 Ns
- 5.8×10−3 Ns
- 5.8×103 Ns
- 5×103 Ns