AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

A car of mass $1000 kg$ moving with a velocity of $45 km / h$ collides with a tree and comes to stop in $5 s$ . what will be the force exerted by the car on the tree?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

2700 N

1500 N

1000 N

2500 N

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

A car of mass

1000 kg

moving with a velocity of

45 km / h

collides with a tree and comes to stop in

5 s

. The force exerted by car is

2500 N

.
Given data in the problem,
Initial velocity,

u = 45 km h^{- 1}

Converting km

h^{- 1}

to m

s^{- 1}

\Rightarrow u = 45 km h^{- 1}

= 45 \times \frac{5}{18}

= 12.5 m s^{- 1}

Time,

t = 5 s

Mass of car,

m = 1000 kg

Final velocity,

v = 0

By using first equation of motion,

v = u + at

Where,

v = final velocity

u = initial velocity

a = acceleration

t = time

\Rightarrow 0 = 12.5 + a \times 5

\Rightarrow a = - 12.5 / 5

\Rightarrow a = - 2.5 m s^{- 2}

(Negative sign shows that the acceleration is in negative or say retardation)
So, the force exerted by the car is given by

F = ma

\Rightarrow F = 1000 \times (2.5)

\Rightarrow F = 2500 N

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!