Question

. The speed -time graph of an ascending passenger lift is given below : then calculate the acceleration of the lift : (a) during the first two seconds (b) between second and tenth second ? (c) during the last two seconds ? *
3 points

2.3 m/s^-2 , zero , 2.3 m/ s^-2
2.3 m/s^-2 , zero , -2.3 m/ s^-2
2 m/s^-2 , zero , 2.3 m/ s^-2
2.3 m/s^-2 , zero , 2 m/ s^-2​

Answer 1

As per attached drawing the time speed graph is show

$\text { (i) } \frac{4.6 \mathrm{~m} / \mathrm{s}}{2 \mathrm{~s}}=2.3 \mathrm{~m} / \mathrm{s}^{2}$

$\text { (ii) } 0 \mathrm{~m} / \mathrm{s}^{2}$

$\text { (iii) } \frac{0-4.6}{2} \mathrm{~m} / \mathrm{s}^{2}=-2.3 \mathrm{~m} / \mathrm{s}^{2}$

The acceleration aas per graph we have the following answer