Question

peanut the cat is running along at 4.3m/s when he sees a door 3.3m ahead. he immediately tries to stop, but skids along the floor, slowing down at 2.9m/s^2 .
a). sketch a graph of peanut's acceleration vs.time
b).does he stop or does he slam into the door ?
c)if he does stop, how far from the door is he?
d). if he slams into the door, how fast is he going when he hits?
use kinematics formulas

Answer 1

b)
u = 4.3, a = -2.9, v = 0, s = distance

where u = initial velocity , v = final velocity, a = deceleration

use one of the equations for constant acceleration:-
v^2 = u^2 + 2as
0 = 4.3^2 - 2*2.9 * s
s = 4.3^2/ 5.8 = 3.19 m

so does he stop os slam into the door?

Answer 2

thank you!

Answer 3

yw