Application Task - EPE 05/02/21
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Last updated almost 5 years ago
16 questions
1
What is the kinetic energy of a soccer ball which has a mass of 0.8 kg and is kicked at a velocity of 10 m/s?
What is the kinetic energy of a soccer ball which has a mass of 0.8 kg and is kicked at a velocity of 10 m/s?
1
Rodger Federer swung a bat which had a mass of 2kg at a velocity of 45 m/s. How many joules of kinetic energy could he give to a ball?
Rodger Federer swung a bat which had a mass of 2kg at a velocity of 45 m/s. How many joules of kinetic energy could he give to a ball?
1
A boy has a mass of 55 kg. He climbs 12 m up a tree. What is his gain in GPE?
A boy has a mass of 55 kg. He climbs 12 m up a tree. What is his gain in GPE?
1
A golf pro swings her driver which weighs 0.75 kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.
A golf pro swings her driver which weighs 0.75 kg at a velocity of 60 m/s. Calculate the kinetic energy of the club.
1
A box is attached to a compressed spring that has a spring constant of 300 N/m. The spring is compressed 30 cm. What is the elastic potential energy of the spring?
A box is attached to a compressed spring that has a spring constant of 300 N/m. The spring is compressed 30 cm. What is the elastic potential energy of the spring?
1
Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s.
Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s.
1
An astronaut has a total mass of 110 kg. On the moon, she climbs into her spacecraft, 5 m up a ladder. The strength of gravity on the moon is 1.6N/kg. What is the energy she gains by climbing up the ladder?
An astronaut has a total mass of 110 kg. On the moon, she climbs into her spacecraft, 5 m up a ladder. The strength of gravity on the moon is 1.6N/kg. What is the energy she gains by climbing up the ladder?
1
The spring constant is 5333N/m. What is the potential energy of this spring when it compressed by 3.50cm?
The spring constant is 5333N/m. What is the potential energy of this spring when it compressed by 3.50cm?
1
If the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic energy?
If the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic energy?
1
A mountain bike’s suspension works on a series of springs. What is the energy stored in the spring when the bike goes over a bump causing a compression of 2cm. The spring constant is 33N/m.
A mountain bike’s suspension works on a series of springs. What is the energy stored in the spring when the bike goes over a bump causing a compression of 2cm. The spring constant is 33N/m.
1
Deep in the forest, a 17.0g leaf falls from a tree and drops straight to the ground.
a) If its initial height was 5.30m, what is its gravitational energy of the leaf at the start (3 sig fig)?
Deep in the forest, a 17.0g leaf falls from a tree and drops straight to the ground.
a) If its initial height was 5.30m, what is its gravitational energy of the leaf at the start (3 sig fig)?
1
Deep in the forest, a 17.0g leaf falls from a tree and drops straight to the ground.
b) How much kinetic energy does it has, just as it hits the ground?
Deep in the forest, a 17.0g leaf falls from a tree and drops straight to the ground.
b) How much kinetic energy does it has, just as it hits the ground?
1
A 1.70kg block slides on a horizontal, frictionless surface until it encounters a spring with a force constant of 955 N/m. The block compresses the spring by 4.60cm before turning around and sliding in the opposite direction. Find the elastic potential energy of the spring.
A 1.70kg block slides on a horizontal, frictionless surface until it encounters a spring with a force constant of 955 N/m. The block compresses the spring by 4.60cm before turning around and sliding in the opposite direction. Find the elastic potential energy of the spring.
1
A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seat-top?
A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at the height of the seat-top?
1
Communications satellites orbit the Earth at a height of 36 000 km. If such a satellite has a mass of 250 kg, what, approximately, is the stored energy the satellite has?
Communications satellites orbit the Earth at a height of 36 000 km. If such a satellite has a mass of 250 kg, what, approximately, is the stored energy the satellite has?
1
An 82.0kg mountain climber is in the final stage of the ascent of 4301-m-high Pikes peak. What is the change in gravitational potential energy as the climber gains the last 100.0m of altitude?
An 82.0kg mountain climber is in the final stage of the ascent of 4301-m-high Pikes peak. What is the change in gravitational potential energy as the climber gains the last 100.0m of altitude?