A car of mass 200 kg is moving with an initial velocity of 20 m/s and

1.	A car of mass 200 kg is moving with an initial velocity of 20 m/s and after t seconds the final velocity of the car becomes 40 m/s. Calculate the change in momentum of the car. *
Answer» ANSWER: mass(m)= 2400 kg, initial VELOCITY(u)- 20m/s, final velocity(v) =0 time taken(t)= 10s retardation= ? force=? we can say thar retardation is negative acceleration (i)by USING first equation of motion,we get v=u +at 0= 20+aX10 0= 20+10a -20 = 10a -20/10= a -2= a thus, retardation= 2m/s2 (ii) f= ma f= 2400 X (-2) = -4800N Step-by-step explanation:

A car of mass 200 kg is moving with an initial velocity of 20 m/s and after t seconds the final velocity of the car becomes 40 m/s. Calculate the change in momentum of the car. *

Answer»

mass(m)= 2400 kg, initial VELOCITY(u)- 20m/s, final velocity(v) =0 time taken(t)= 10s retardation= ? force=?

we can say thar retardation is negative acceleration

(i)by USING first equation of motion,we get

v=u +at

0= 20+aX10

0= 20+10a

-20 = 10a

-20/10= a

-2= a

thus, retardation= 2m/s2

(ii) f= ma

f= 2400 X (-2)

= -4800N

Step-by-step explanation: