Question

If a car of mass 1200 kg has a speed of 5 m/s, how much kinetic energy would it need to gain in order to speed up to 15 m/s? (Number only; write out the full number

Answer 1

Answer:

Step-by-step explanation:

Mass of car = 1200kg

Speed = 5m/s

KE1= 1/2mv²

= 1/2*1200*(5²)

KE1 = 15000 J

Now,ATQ,

V=15m/s

KE2=1/2*1200*15²

KE2=135000J

Now,∆KE=KE2-KE1

∆KE=135000-15000

=120000J