Home
Class 9
PHYSICS
Two people push a car for 3 s with a com...

Two people push a car for 3 s with a combined net force of `200 N.(AS_(1))`
(a) Calculate the impulse provided to the car.
(b) If the car has a mass of 1200 kg, what will be its change in velocity ?

Text Solution

Verified by Experts

(a) `600 N.s`
(b) `0.5 m//s`
Promotional Banner

Topper's Solved these Questions

  • LAW OF MOTION

    NCERT TAMIL|Exercise LET US IMPROVE OUR LEARNING (HIGHER ORDER THINKING QUESTIONS )|4 Videos

  • LAW OF MOTION

    NCERT TAMIL|Exercise LET US IMPROVE OUR LEARNING (MULTIPLE CHOICE QUESTIONS )|5 Videos

  • LAW OF MOTION

    NCERT TAMIL|Exercise LET US IMPROVE OUR LEARNING (REFLECTIONS ON CONCEPTS )|3 Videos

  • IS MATTER PURE?

    NCERT TAMIL|Exercise THINK AND DISCUSS|9 Videos

  • LIGHT

    NCERT TAMIL|Exercise Problem |5 Videos

Similar Questions

Explore conceptually related problems

A 2000 kg car travelling at 20 ms^(-1) hits concret wall and stops in 0.05 s . What magnitude of impulse did the wall exert on the car ?

The rectangualr wire- frame, shown in has a width d, mass m, resistance R and a large length. A uniform magnetic field B exists to the left of the frame. A constant force F starts pushing the frame into the magnetic field at t =0. (a) Find the acceleration of the frame when its speed has increased to v. (b) Show that after some time the frame will move with a constant velocity till the whole frame enters into the magnetic field. find this velocity v_0 . (c) show that the velocity at tiem t is given by v= v_0(1 - e^(-Ft/mv_0) .

The earth revolves round the sun due to gravitatinal attraction. Suppose that the sun and the earth are point particle with their existing masses and that Bhor's quantization rule for angular monentum is valid in the case of gravitation (a) Calculate the minimum radius the earth can have for its orbit. (b) What is the value of the principle quantum number n for the present radius ? Mass of the earth = 6.0 xx 10^(24) kg, mass of the sun = 2.0 xx 10^(30) kg, earth-sun distance = 1.5 xx 10^(11)m .

In the section 3.7.3 (Banking of road) we have not included the friction exerted by the road on the car. Suppose the coefficient of static friction between the car tyre and the surface of the road is mu_s , calculate the minimum speed with which the car can take safe turn? When the car takes turn in the banked road, the following three forces act on the car. (1) The gravitational force mg acting downwards (2) The normal force N acting perpendicular to the surface of the road (3) The static frictional force f acting on the car along the surface.

Ethylene glycol (molar mass = 62 g mol ^(-1)) is a common automobile antifreeze. Calculate the freezing point of a solution containing 12.4 of this substance in 100 g of water. Would it be advisable to keep this substance in the car radiator during summer? ( K_(f) for water= 1.86 k kg//mol) (K_(b) for water = 0.512 K kg//mol.)

A 100 kg block is started with a speed of 2.0 m s^(-1) on a long, rough belt kept fixed in a horizontal position. The coefficient of kinetic friction between the block and the belt is 0.20. (a) calculate the change in the internal energy of the block-belt system as the block comes to a stop on the belt. (b) consider the situation from a frame of reference moving at 2.0 m s^(-1) along the initial velocity of the block. as seen from this frame, the block is gently put on a moving belt and in due time the block starts moving with the belt at 2.0 m s^(-1) , calculate the increase in the kinetic energy of the block as it stops slipping past the belt. (c ) find the work done in this frame by the external force holding the belt.

A car takes a turn with velocity 50 ms^(-1) on the circular road of radius of curvature 10 m. Calculate the centrifugal force experienced by a person of mass 60 kg inside the car?