Question

If you throw a ball straight upward at a speed

of 10 m/s, how long will it take to reach zero
speed? How long will it take to return to its
starting point? How fast will it be going when
it returns to its starting point?

Answer 1

Step-by-step explanation:

hey! what's up dude

the answer of this will be 1. 1 sec

2. 2sec

3. 10 m/s

hope you find help

now the reson for this will be

let's look in 1st part

we will use v=u+at

where v will be zero at highest pont u is 10m/s

we can take g as 10 or 9.8

so

0=10-10t

so it becomes

-10/-10=t

so 1 sec will be the answer

in 2nd part same time will be taken to come back so total time will be 2 sec

3rd part we can use v=u+at

where we have to find v, u=10 g=-10 and t=2 sec

now v=10-20 so v= -10 m/s

since in question it's asking abaout speed and as speed is a scaler quantity so answer will be mode of -10 so it becomes 10m/s

hope it's help you..