A projectile is any object that moves under the influence of gravity and momentum only. Examples are; a thrown ball, a fired bullet, a kicked ball, thrown javelin, etc.

Given that the ball was thrown vertically upward on the top of a skyscraper of height 61.9 m. So that the velocity can be determined by;

u = $\sqrt{\frac{2H}{g} }$

Where: u is the velocity of the object, H is the height and g is the gravitational force on the object. Given that: H = 61.9 m and g = 10 m/ $s^{2}$ , then;

u = $\sqrt{\frac{2*61.9}{10} }$

= $\sqrt{\frac{123.8}{10} }$

u = 3.5185

The velocity of the ball is 3.52 m/s.

3 0

4 years ago

Can gravity pull? my science class says it can but i dont believe it

mr_godi [17]

Answer:

yeah it can. well gravity is basically what's keeping us on earth without floating away. without gravity we would basically be floating like we're in space. ¯\_༼ ಥ ‿ ಥ ༽_/¯

7 0

3 years ago

As a cat pounces on a mouse, its muscles consume 10 units of potential energy (which the cat previously gained from the food it

taurus [48]

6 units of energy were transferred into heat.

7 0

3 years ago