If an object doubles its power what effect does it have on the work it can do in the same amount of time?
Double
100
A 40 N bag is lifted 1.4 meters. How much work is done?
56 Joules
100
What is the kinetic energy of a 2 kg football traveling at 10 m/s?
100 Joules
100
What is potential energy of a 80 N weight 2.5 meters high?
200 Joules
100
It took john 3 seconds to lift a 40 N bag 1.4 meters. How much power is used?
18.67 Watts
200
If a microwave with 500 Watts heats a hot pocket in 60 seconds. How long will it take for a 2000 Watt microwave to heat up the hot pocket?
15 seconds
200
Betty does 900 Joules of work lifting a 45 N bag. How high did she lift the bag?
20 meters
200
What is the mass of a football traveling at 20 m/s with a kinetic energy of 784 Joules?
3.92 Kg
200
What is potential energy of a 13 kg rock 4 meters in the air?
509.6 J
200
A small engine has 8000 Watts of power and works for 4 seconds. How much work does it do?
32000 Joules
300
A 4 kg rock has 800 Joules of potential energy. If it is lowered half its height what is its potential energy?
400 Joules
300
It takes 80000 Joules of work to push a 40 kg car a distance of 30 meters. How much force was used?
2666.67 N
300
A 40 kg bag is being held up 15 meters in the air. What is the bags velocity when it strikes the ground? (neglecting air resistance)
17.14 m/s
300
A 4 kg rock has 8000 Joules of potential energy. How high is the rock?
204.08 meters
300
Arian pushes a box with 12 N of force and moves it 20 meters in 4 seconds. How much power is exerted?
60 Watts
400
If a 800 Newton car has 900 Joules of kinetic energy, what is its kinetic energy when you double the velocity?
3,600 Joules
400
Leo does 900 Joules of work lifting a 4 kg ball. How high did he lift it?
22.96 Meters
400
A 40 kg rock is held 4 meters in the air. How much kinetic energy will it have when it strikes the ground?
1568 Joules
400
A rock has 7000 Joules of potential energy 12 meters in the air. How much does the rock weigh?
583.33 N
400
A 700 Watt microwave takes 4 minutes to heat up a hot pocket. How much work is done?
168000 J
500
If a rock is moving at 24 m/s and has a kinetic energy of 36 Joules, what is its velocity when it has a kinetic energy of 324 Joules?
72 m/s
500
An elevator lifts 4 adults with a mass of 70 kg and a child with a mass of 20 kg. How much work does the elevator do lifting the people 10 meters?
29400 Joules
500
A car weighs 98000 newtons and is moving at 6 m/s. What is the cars kinetic energy?
180000 Joules
500
A 8 kg rock is shot up with a velocity 12 m/s. How high does it go?
7.35 meters
500
It takes 190000 Joules of work to heat up chicken nuggets in the microwave. Usually I use a 800 Watt microwave but want to buy a new one twice as powerful. How long would the new one take to heat up the chicken nuggets?