Question

Question 58:
The speed-time graph of an ascending passenger lift is given alongside.
What is the acceleration of the lift:
(i) during the first two seconds ?
(ii) between second and tenth second ?
(iii) during the last two seconds ?

Lakhmir Singh Physics Class 9

Answer 1

Answer:

Explanation:

Yes please tell the answer

Answer 2

Hello Student,

Corresponding diagram is missing from the question. I'll add that in image.

◆ Answers -

1. During first 2 s, a = 2.3 m/s²
2. Between 2 s to 10 s, a = 0 m/s²
3. In last 2 s, a = -2.3 m/s²

◆ Explanation -

(i) Acceleration during the first two seconds -

a = (v-u)/t

a = (4.6-0)/2

a = 2.3 m/s²

(ii) Acceleration between second and tenth second -

a = (v-u)/t

a = (4.6-4.6)/8

a = 0 m/s²

(iii) Acceleration during the last two seconds -

a = (v-u)/t

a = (0-4.6)/2

a = -2.3 m/s²

Thanks dear...