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 :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Conservation of MomentumQuiz | Conservation of MomentumQuiz | Conservation of Momentum33 mins
Test your knowledge of Laws of motionTest your knowledge of Laws of motionTest your knowledge of Laws of motion44 mins
Quiz | Lets Say Hey to Newton!!!Quiz | Lets Say Hey to Newton!!!Quiz | Lets Say Hey to Newton!!!50 mins
NCERT | Newton's Second LawNCERT | Newton's Second LawNCERT | Newton's Second Law41 mins
Lakhmir Singh | Force and Laws of Motion Part-3Lakhmir Singh | Force and Laws of Motion Part-3Lakhmir Singh | Force and Laws of Motion Part-347 mins
What is Impulse?What is Impulse?What is Impulse?44 mins
Understanding Action-Reaction PairUnderstanding Action-Reaction PairUnderstanding Action-Reaction Pair36 mins
Quiz | Become a Master of Conservation of MomentumQuiz | Become a Master of Conservation of MomentumQuiz | Become a Master of Conservation of Momentum32 mins
Lets understand Circular MotionLets understand Circular MotionLets understand Circular Motion42 mins
Lakhmir Singh | Force and Laws of Motion Part 1Lakhmir Singh | Force and Laws of Motion Part 1Lakhmir Singh | Force and Laws of Motion Part 142 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses