# Physical Science

posted by Jinja

Two objects were lifted by a machine. One object had a mas of 2 kilograms, and was lifted at a speed of 2 m/sec. The other had a mass of 4 kilogram was lifted at a rate of 3 m/sec.
-------------------------------------------
a) Which object had more kinetic energy being lifted?

b) Which object had more potential energy when it was lifted to a distance of 10 meters? Show your calculation.

Help!!!

1. Damon

Ke = (1/2) m v^2

(1/2)*2*2^2 = 4 Joules
(1/2)*4*3^2 = 18 Joules

B) m g h
2*g*10
4*g*10
which is bigger?

## Similar Questions

1. ### physcial science

a 50 kg crate is lifted to a height of 10 meters. a. how much potential energy does the crate have after being lifted?
2. ### physical science

A 50.0 kg object is lifted using 4900.0 J. How high is it lifted?
3. ### physical science

a 50kg crate is lifted to a height of 10 meters. how much potential energy does the crate have after being lifted?
4. ### physical science

A 50 kg crate is lifted to a height of 10 meters.How much potential energy does the crate have begin lifted?
5. ### physics

A 4.0 kg object is lifted 1.5 m. (a) how much work is done against the earth's gravity ?
6. ### Physics

An object of mass .550kg is lifted from the floor to a height of 3.5m at a constant speed. If the object is released from rest after it is lifted, what is its kinetic energy just before it hits the floor?
7. ### science

An object with a mass of 21 kilograms is lifted through a distance of 7 meters. How much work is done A. 147j B.703n c.15,625N
8. ### Math (for Damon)

Nathan and Steven stacked boxes on a shelf. Nathan lifted 13 boxes and Steven lifted 15 boxes. The boxes that Nathan lifted each weighed 12 lb more than the boxes Steven lifted. Which expression represents the total number of pounds …
9. ### math

Nathan and Steven stacked boxes on a shelf. Nathan lifted 13 boxes and Steven lifted 15 boxes. The boxes that Nathan lifted each weighed 12 lb more than the boxes Steven lifted. Which expression represents the total number of pounds …
10. ### Mathematics

Nathan and Steven stacked boxes on a shelf. Nathan lifted 13 boxes and Steven lifted 15 boxes. The boxes that Nathan lifted each weighed 12 lb more than the boxes Steven lifted. Which expression represents the total number of pounds …

More Similar Questions