Answer:
1) &
east of sign post
2) east of sign post
3) east of the signpost.
4)
Explanation:
Given:
- position of motorcyclist on entering the city at the signpost,
- time of observation after being at x=5m east of the signpost,
- constant acceleration of the on entering the city,
- distance of the motorcyclist moments later after entering,
- velocity of the motorcyclist moments later after entering,
<u>Now the initial velocity on at the sign board:</u>
where:
initial velocity of entering the city at the signpost
Putting respective values:
1)
Position at time sec.:
Using equation of motion,
because it has already covered 5m before that point
east of sign post
Velocity at time sec.:
2)
Position when the velocity is :
using equation of motion,
east of sign post
3)
Given that:
acceleration be,
time,
Position after the new acceleration and the new given time:
using equation of motion,
east of the signpost.
4)
now time of observation,