lasses are canceled due to snow, so you take advantage of the extra time to conduct some physics experiments. You fasten a large toy rocket to the back of a sled and take the modified sled to a large, flat, snowy field. You ignite the rocket and observe that the sled accelerates from rest in the forward direction at a rate of 12.512.5 m/s2 for a time period of 3.303.30 s. After this time period, the rocket engine abruptly shuts off, and the sled subsequently undergoes a constant backward acceleration due to friction of 5.655.65 m/s2. After the rocket turns off, how much time does it take for the sled to come to a stop?

t = 7.3 s

Explanation:

First we consider accelerated motion and use first equation of motion:

Vf = Vi + at

where,

Vf = Final Velocity = ?

Vi = Initial Velocity = 0 m/s

a = acceleration = 12.5 m/s²

t = time for acceleration = 3.3 s

Therefore,

Vf = 0 m/s + (12.5 m/s²)(3.3 s)

Vf = 41.25 m/s

Now, we consider the decelerated motion and use first equation of motion again:

Vf = Final Velocity = 0 m/s (since, sled will finally stop)

Vi = Initial Velocity = Vf of accelerated motion = 41.25 m/s

a = deceleration = -5.65 m/s²

t = time taken to stop = ?

Therefore,

0 m/s = 41.25 m/s + (-5.65 m/s²)t

t = (41.25 m/s)/(5.65 m/s²)

t = 7.3 s

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!