# physics

A crane slowly lifts a cement slab weighing 2,500 N to a height of 12 m. The slab is accidentally dropped. What is its KE as it hits the ground?

1. 👍 0
2. 👎 0
3. 👁 136
1. it must be 2500*12 Joules

1. 👍 0
2. 👎 0
2. idk the answer Soooooo!!!!!!!!!!! tell me

1. 👍 0
2. 👎 0
3. It's 30,000J

1. 👍 0
2. 👎 0
posted by Enrique

## Similar Questions

1. ### physics

What is the work done by a crane to lift a 500kg beam over a height of 50.0m? Assume the crane lifts the beam at a constant velocity.

asked by help on October 30, 2018
2. ### Physics

A crane lifts a Load of 50000g very slowly through a distance of 150cm vertically, calculate the work done against gravity if g=10.mls2

asked by Glorious on June 6, 2016
3. ### science

A crane whose motor has a power input of 5.0 kW lifts a 120-kg load of bricks through a height of 30m in 90s. what is the efficiency of the crane, which is the ratio between its output power and its input power.

asked by tasha on February 19, 2007
4. ### physcis

A crane whose motoer has a power input of 5.0kW lifts a 1200-kg load of bricks through a height 30m in 90s. Find the efficency of the crane which is the ratio between its output power and its input power

asked by Ania on November 15, 2011
5. ### Physics

crane lifts a 75 kg girder 8.85 m. How much work does the crane do lifting with an upward acceleration of 1.20 m/s ^2?

asked by tionne on November 13, 2012
6. ### math

An L-shaped concrete slab being prepared for the foundation of a new house is made up of two rectangles with dimensions 3 m by 2 m and 10 m by 6 m. a) Find the total area of the concrete slab. Total area = (3*2) + (10*6) = 66m^2

asked by anonymous on February 11, 2018
7. ### physics

A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)

asked by Mota on January 29, 2010
8. ### statistics

A crane is designed in such a way that it can lift a maximum load of 2750kg.Is the crane overload if the container is filled with 50 bags of cement 40kg each and 5 machine of average 100kg?

asked by Ana on November 10, 2016
9. ### algebra (check work)

a camera car with a crane is used to film a movie. the crane's max. height is 18ft and the min. height is 4ft. write a compound inequality that describes the possible heights of the crane. 18≥x≤4

asked by daya on September 12, 2016
10. ### Science

A craane lifts an 8000N height 75m to the top of a buildings in 30s. How much power does the crane use?

asked by Rahul on January 4, 2017

More Similar Questions