Q. 314.0( 8 Votes )
How long will it take a force of 10 N to stop a mass of 2.5 kg which is moving at 20 m/s?
Answer :
Force applied (F) = -10 N (since the force is acting in the opposite direction of motion or opposing the motion)
Mass of body (m) = 2.5kg
Initial velocity of body (u) = 20m/s
Final velocity of body (v) = 0m/s
According to Newton's second law of motion
F = ma
-10 = 2.5×a
-10/2.5 = v-u/t (since a = v-u/t)
-4t = 0 - 20
t = -20/-4
t = 5 sec
Rate this question :
Quiz | Conservation of Momentum33 mins
Test your knowledge of Laws of motion44 mins
Quiz | Lets Say Hey to Newton!!!50 mins
NCERT | Newton's Second Law41 mins
Lakhmir Singh | Force and Laws of Motion Part-347 mins
What is Impulse?44 mins
Understanding Action-Reaction Pair36 mins
Quiz | Become a Master of Conservation of Momentum32 mins
Lets understand Circular Motion42 mins
Lakhmir Singh | Force and Laws of Motion Part 142 mins
How long will it take a force of 10 N to stop a mass of 2.5 kg which is moving at 20 m/s?
Lakhmir Singh & Manjit Kaur - PhysicsThe physical quantity which makes it easier to accelerate a small car than a large is measures in the unit of:
A. m/s B. kg
C. kg m/s D. kg m/s2
Lakhmir Singh & Manjit Kaur - PhysicsExplain why, a cricket player moves his hands backwards while catching a fast cricket ball.
Lakhmir Singh & Manjit Kaur - PhysicsA car of mass 2400 kg moving with a velocity of 20 m s-1 is stopped in 10 seconds on applying brakes. Calculate the retardation and the retarding force.
Lakhmir Singh & Manjit Kaur - PhysicsThe rate of change of momentum is:
Evergreen - Science