Question

if a body has a velocity of 50m/s and the uniform acceleration is 5m/s sq. find the time it takes to travel a distance of 240m

Answer 1

Answer:

24sec

Explanation:

as acceleration is constant,

using 2nd  equation of  kinematics, s=ut+at^2/2

240=50*t+1/2*5*t^2

5t^2+100t-480=0

t=24 t=-4

since time can't be negative toh U're crispy sa ans is 24sec

Answer 2

Answer:

Given,

u=50m/s

a=5m/s2

S=240m

v=?

t=?

By Applying the (iii) equation, we get

= v2-u2=2aS

=v2-502=2*5*240

=v2=2400+2500

=v2=4900

=v=70

Now, by applying the equation (i), we get,

=v=u+at

=70=50+5t

=20=5t

=t=4 sec.