Question

an extern force of 5 N changes the velocity of a body of mass 2kg from 5m/sto 7m/s.the time for which the force has been applied is

Answer 1

HERE IS YOUR ANSWER

GIVEN :

INITIAL VELOCITY(U) = 5M/S

FINAL VELOCITY (V) = 7M/S

FORCE = 5 N

MASS = 2 KG

WE KNOW THAT.

FORCE = MASS × ACCELERATION

5 = 2 × ACCELERATION

ACCELERATION(A) = 2.5 M/S^2

WE ALSO KNOW THAT

V = U + AT. ( T IS TIME )

7 = 5 + 2.5 × T

T = 2/2.5

T = 0.8 seconds

TIME = 0.8 SECONDS

HOPE MY ANSWER IS CORRECT

Answer 2

Answer:

Hey mate

answer is 0.8 second