Home
Class 11
PHYSICS
Give the magnitude and direction of the ...

Give the magnitude and direction of the net force acting on (a) a drop of rain falling down with a constant speed, (b) a cork of mass 10 g floating on water, (c) a kite skillfully held stationary in the sky, (d) a car moving with a constant velocity of 30 km/h on a rough road, (e) a high-speed electron in space far from all material objects, and free of electric and magnetic fields.

Text Solution

Verified by Experts

(a) From Newtons first law of motion raindrop is moving in downward direction with constant velocity hence resultant force on it is zero.
(b) Cork is floating on water Here weight of cork is balanced by Buoyant force . Hence reusltant force on cork is zero .
(c ) Net force on a kite skillfully held stationary in the sky is zero because it is at rest.
(d ) Since car is moving with a constant velocity the net force on the car is zero .
(e ) Since electron is far away from all material agncies producing electromagnetic or gravitational force the net force on the electron is zero .
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION -B (ADDITIONAL EXERCISE )|17 Videos

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION -B (NUMERICAL FROM DARPAN BASED ON TEXTBOOK)|8 Videos

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION -B (NUMERICAL FROM TEXTUAL ILLUSTRATION)|12 Videos

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise QUESTIONS PAPER Section - D|1 Videos

  • MACHANICAL PROPERTIES OF SOLIDS

    KUMAR PRAKASHAN|Exercise QUESTION PAPER|11 Videos

Similar Questions

Explore conceptually related problems

If an object is moving with constant velocity then the motion is

What is the acceleration of a race car that moves at constant velocity of 300 km/h ?

No force is required to move an object with a constant velocity. Why?

Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg, (a) just after it is dropped from the window of a stationary train, (b) just after it is dropped from the window of a train running at a constant velocity of 36 km/h, (c ) just after it is dropped from the window of a train accelerating with 1 m s^(-2) , (d) lying on the floor of a train which is accelerating with 1 m s^(-2) , the stone being at rest relative to the train. Neglect air resistance throughout.

Give the magnitude and direction of the net force acting on a stone of mass 0.1 kg, (a) just after it is dropped from the window of a stationary train, (b) just after it is dropped from the window of a train running at a constant velocity of 36 km/h, (c) just after it is dropped from the window of a train accelerating with 1 ms^(2) , (d) lying on the floor of a train which is accelerating with 1 ms-2 , the stone being at rest relative to the train. Neglect air resistance throughout.

Explain -For car moving with constant (uniform) velocity resultant force is zero”.

A car moving with constant speed of 72 km h 1 is said to be moving at ......... ms^(-1).

A trolley of mass 200 kg moves with a uniform speed of 36 km/h on a

A car is moving with constant speed on a rough banked road. Figure shows the free body diagram of car in three situation A, B & C respectively:

A bead is arranged to move with constant speed around a loop that lies in a vetical plane. The magnitude of the net force on the bead is

Home
Profile