Home Physics Motion in a Straight Line Mix A spaceship ferrying walks to Moon base. It …
Physics Motion in a Straight Line Mix Numeric Response
Published on: September 12, 2026

A spaceship ferrying walks to Moon base. It takes a straight line path from the earth to the moon, a distance of 384,000 km. Suppose it accelerates at 20 m/s2 for the first 15 min of the trip. Then travels with same speed until the last 15 min, when it decelerates at 20 m/s2 just coming to rest as it reaches the moon.

(i) What distance does it travel while decelerating?

A
6.1 × 103 km 0.95 170 min
B
5.1 × 103 km 0.23 270 min
C
3.1 × 103 km 0.40 370 min
D
8.1 × 103 km (ii) What fraction of the total distance it travelled at constant speed? 0.52 (iii) What total time is required for the trip? 470 min

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Text Solution

Verified by Experts
The correct answer is:
5.1

Ans.

(i)

Sol. 5.1 × 103 km

(ii)

Sol. 0.95

(iii)

Sol. 370 min

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