Home
Class 11
PHYSICS
A solid sphere moves at a terminal veloc...

A solid sphere moves at a terminal velocity of `20ms^-1` in air at a place where `g=9.8ms^-2`. The sphere is taken in a gravity free hall having air at the same pressure and pushed down at a speed of `20 ms^-1`

A

its initial acceleration will be `9.8ms^-2` downward

B

its initial acceleration will be `9.8ms^-2` upward

C

The magnitude of acceleration will decrease as the time passes.

D

It will eventually stop

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SOME MECHANICAL PROPERTIES OF MATTER

    HC VERMA|Exercise Exercises|32 Videos
  • SOME MECHANICAL PROPERTIES OF MATTER

    HC VERMA|Exercise Objective-1|29 Videos
  • SIMPLE HARMONIC MOTION

    HC VERMA|Exercise Exercises|58 Videos
  • SOUND WAVES

    HC VERMA|Exercise All Questions|139 Videos

Similar Questions

Explore conceptually related problems

A solid sphere falls with a terminal velocity of 20 ms^-1 in air. If it is allowed to fall in vacuum

The velocity of sound in air at a particular temperature is 330ms^(-1) . What will be its value when temperature is doubled and the pressure is halved?

A spere of mass 20 kg moving with a velocity 40 ms^(-1) collides with another sphere of mass 15 kg which is at rest . After collision they move with the same velocity . Find the velocity .

A train standing in a station-yard, blows a whistle of frequency 400Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 ms^(-1) . What are the frequency wavelength and speed of sound for an observer standing on the station.s platform? Is the situation exactly identical the case when the air is still and the observer runs towards the yard at a speed of 10 ms^(-1) ? The speed of sound in still air can be taken as 340 ms^(-1)

What will be the frequency of sound having 0.20 m as its wavelength, when it travels with a speed of 331 ms^(-1) ?

What will be the frequency of sound having 0.20m as its wavelength, when it travels with a speed of 331 ms^(-1) ?

What will be the frequency sound having 0.20 m as its wavelength, when it travels with a speed of 331ms^(-1) ?