Monday

December 22, 2014

December 22, 2014

Posted by **James** on Friday, June 1, 2012 at 10:11pm.

(a) What will be its kinetic energy when it hits the ground?

(b) What will be its speed when it hits the ground?

- Physics -
**Delbarre**, Saturday, June 2, 2012 at 2:10amconservation of energy

mgh + (1/2)m(Vi)² = (1/2)m(Vf)²

2(gh + (1/2)(Vi)²) = (Vf)²

square root( 2gh +(Vi)²) = (Vf)

square root( 256.76 + 132,25) = (Vf)

square root( 389,01) = (Vf)

square root( 389,01) = (Vf)

19.7m/s = Vf

your kinetic energy is

(0.5)(0.054)(19.7)² = 10.5 J

enjoy the answer

**Answer this Question**

**Related Questions**

Physics - Suppose you throw a 0.058-kg ball with a speed of 11.0 m/s and at an ...

Physics - Hypothetically, you are standing on the balcony of an apartment on the...

Physics - HELP PLEASE. Hypothetically, you are standing on the balcony of an ...

Physics - A ball is thrown at an angle of 37.1degrees above the horizontal from ...

physics - A boy throws a ball at 5.5 m/s at an angle of 25.4° above the ...

Physics - Standing on the top ledge of a 55 m high building you throw a ball ...

physics ( help) - Hypothetically, if you were standing on the balcony of an ...

physics - The free throw line in basketball is 4.57 m (15 ft) from the basket, ...

Physics - Standing on the top ledge of a 55 m high building you throw a ball ...

HARD PHYSICS - A playground is on the flat roof of a city school, 5.7 m above ...