Question

An object is thrown vertically upward and rises to the height of 10m. Calculate the velocity of the object which was thrown upwards

Answer 1

$10 \sqrt{2 }$

Answer 2

Answer:

for this use equation of motion:

Explanation:

Use newton's equation of motion for uniformly accelerating body

v² = u² + 2as

Where v is final velocity, u is initial velocity, a is acceleration and s is distance

According to the question final speed is zero at 10m above from the ground and initial speed is asked.

Here acceleration is - g(gravity) means body is decelerating.

• So using above equation

• v² = u² - 2gh

• 0 =u² - 2*10*h

• u² = 20*10

• u = 2√10m/s