Question

An object of mass 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s in 6s. Calculate the initial and final momentum of the object. Also find the magnitude of force exerted on the object

Answer 1

Answer:

p=mv=100x 5 =500kgm/s (initial)

and 800(final)

F=m(v-u) /t=100 x (8-5) /6=100 x 1/2 =50 N

Answer 2

$\huge\bigstar\sf\underline\red{GIVEN:-}$

$\large\sf{u=5m/s}$

$\large\sf{v=8m/s}$

$\large\sf{m=100kg}$

$\large\sf{t=6s}$

$\large\sf{mu=100×5=500kg\:m/s}$

$\large\sf{mv=100×8=800kg\:m/s}$

$\longrightarrow$$\large\sf{F=\frac{mv-mu}{t}}$

$\longrightarrow$$\large\sf{\frac{m(v-u)}{t}}$

$\longrightarrow$$\large\sf{\frac{800-500}{6}}$

$\longrightarrow$$\large\sf{\frac{300}{6}}$

$\longrightarrow$$\large\sf{50N}$