Physics: Mary is at the top of a 25 m steep slide. she is then pushed and starts accelerating at a rate of 4.3 m/s 2. how long will it take her to get to the bottom of the slide?

Mary is at the top of a 25 m steep slide. she is then

jaheimnorman590

11.03.2022

Answer

3.4 s

Explanation

The question can be solve by using the 2nd Newton's law of motion.

s = ut + 1/2at²

Before she is pushed, the initial velocity is zero.

u = 0

Now the equation becomes

s = 0 + 1/2at²

s = 1/2at²

25 = 1/2 × 4.3 × t²

50 = 4.3t²

t² = 50/4.3

= 11.628

t = √11.628

= 3.4 s

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