Question 157: Motion in 1D

Question

A ball is thrown vertically upward. It has a speed of 10 m/sec when it has reached one half of its maximum height. How high does the ball rise? 
(Take g = 10 m/s2.)

Accepted Answer

At height $${h \over 2}$$, speed is = 10 m/s
and at height h, speed  = 0
Using formula,
v
2
= u
2
- 2gh
0 = (10)
2
- 2(10)$${h \over 2}$$
$$ \Rightarrow $$ h = $${{100} \over {10}}$$ = 10 m

Answer

10 m

Answer

5 m

Answer

15 m

Answer

20 m

Motion in 1D

A ball is thrown vertically upward. It has a speed of 10 m/sec when it has reached one half of its maximum height. How high does the ball rise? (Take g = 10 m/s2.)

Choose the correct answer: