i do not know
what is the algebraic expression that'll help me solve this
the formula please
A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine the velocity of the car when t=4s. What is the displacement of the car during the 4-s time interval?
3 answers
u should ask ur mom🙂✌️
a = -3 m/s^2
Vi = 25 m/s
final t = 4 s
===========
v = Vi - a t
x = Xi + Vi t - (1/2) a t^2
so
v = 25 - 3 * 4 = 25 - 12 = 13 m/s at t = 4
x - Xi = 25 *4 - (1/2) 3 *16
= 100 - 24
= 76 meters
or just average speed = (13 + 25) / 2
so distance = (13+25) *4/2 = 76 meters
Vi = 25 m/s
final t = 4 s
===========
v = Vi - a t
x = Xi + Vi t - (1/2) a t^2
so
v = 25 - 3 * 4 = 25 - 12 = 13 m/s at t = 4
x - Xi = 25 *4 - (1/2) 3 *16
= 100 - 24
= 76 meters
or just average speed = (13 + 25) / 2
so distance = (13+25) *4/2 = 76 meters