Kinetic Energy
The mass of an object is 10kg and its velocity is 10m/s. What is the objects kinetic energy?
500 J
An object has a mass of 20kg and it is 20m above the ground. What is the potential energy of the object?
4000J
What are the units for Force?
N or Newtons
A person is moving down a hill a constant speed. What is happening to his kinetic and potential energies?
PE is going down, KE stays the same
An object moving with 5000 J of kinetic energy has a mass of 100kg. What is the velocity of the object?
10 m/s
The potential energy of an object is 900J. The object is 9m off the ground. What is the objects mass?
10 kg
What are the units of acceleration?
m/s^2 or meters per second squared
A football player wants to increase his kinetic energy. What is the best way for him to do so?
To speed up or increase velocity
The weight of an object is is 500N. The velocity of the object is 5 m/s. What is the kinetic energy of the object?
625 J
Mr. O at the bottom of a hill starts to climb a 10m hill with his bike. Mr.O has mass of 90kg and his bike has mass of 10kg. What will his potential energy be halfway up the hill?
5000 J
What are the units for energy?
J or Joules
A person is a height "h" above the ground and he has a mass "m".He goes on a hike and at the top of his hike he is "3h" above the ground. Compared to before he started his hike, how much potential energy does he have?
3 x PE
The kinetic energy of an object is 1000J. The object is moving with a velocity of 5 m/s. What is the weight of an object?
800 N
The weight of an object is 81 N. The acceleration due to gravity is 9 m/s^2. The object is 10m off the ground. What is the potential energy of the object?
800 J
What are the units for velocity?
m/s or meters per second
Mr.O is on a bike ride at Tres Lagos. At the beginning of his bike ride he is moving at a speed of "v" and he has a mass "m". Towards the middle of his bike ride he decides to speed up to a velocity of "3v". How much greater is his kinetic energy after he speeds up?
9x greater.
A 10kg object is moving with a constant velocity of 50 m/s. The object slows down to a speed of 25 m/s?
What is the difference in kinetic energy before and after the object slows down?
9375 J
An astronaut on the moon has a mass 100kg. He jumps into the air and reaches a max height of 2m. The potential energy at the astronauts max height is 324 J. The gravity of the moon is.......
1.62 m/s^2
What are the units for mass?
kg
A person is walking up a hill and as he walks up his speed decreases. What is happening to his kinetic and potential energy?