Work
The theorem that states that the total work done on an object equals the change in that object's energy.
What is the Work-Energy Theorem?
A pendulum swings back and forth. Assuming there is no air resistance, the kinetic energy is at maximum when
What is the bottom of the swing?
The reason airbags help reduce injuries in car accidents.
What is "they increase the time of impact, reducing force the force"?
The type of collision in which two objects stick together after impact.
What is, completely inelastic?
The period of vibration for a 2 kg mass in simple harmonic motion on a spring with a constant of 172 N/m
What is 0.7 seconds?
These three scenarios result in zero work.
What are No net force, No distance travelled, and An angle of 90 degrees?
A roller coaster reaches the top of a hill and momentarily stops before descending. This type of energy is maximized at that point.
What is gravitational potential energy?
This type of collision conserves both kinetic energy and momentum.
What is Elastic?
What is, finding the x and y components?
During simple harmonic motion, when the elastic energy is at its maximum, x equals this part of the wave motion.
What is the amplitude?
What is the area under the graph?
An object of mass 5 kg is lifted 10 m in the air, the gravitational potential energy is
What is 500 J?
This is used to calculate impulse when the force is not constant.
What is the average force?
A 2 kg object moving at 3 m/s collides with a 1 kg object at rest. If the collision is perfectly inelastic, what is their final velocity?
What is 2 m/s?
The final speeds of A and B in the following scenario.
Object A (32 kg) going 4 m/s hits Object B (94 kg) going 26 m/s in a perfectly elastic collision.
The work done by moving a 2.75 kg plant from the floor to a shelf 1.37 m above the floor.
What is 36.9 J?
A ball is dropped from a height of 10m. Just before it hits the ground, the approximate velocity is
What is 14 m/s?
The impulse required to stop a 2 kg object moving at 5 m/s.
What is 10 Ns?
A glitter bomb explodes into 3 equal-sized pieces. One goes E, one goes NW. The last piece goes...
What is Southwest?
The distance from its original position that the mass moves across the counter in the following scenario.
A 2 kg mass attached to a spring with a constant of 342 N/m is pushed back 18 cm. The friction force between the mass and the counter is 12 N.
What is 46 cm?
The work done on a crate by the floor when the crate is moved 13 m, at a constant speed, by a net force of 133.5 N [5o above the horizontal].
What is -1.7 x 103 J?
What is 560 N/m?
The relative mass of both marbles if, when Marble B, sitting stationary on a track, is hit by Marble A moving at 5 m/s, results in Marble A stopping and Marble B moving forward at 5 m/s.
What is, they are the same?
The original velocity of the two objects in the following scenario. ("above" and "below" signify if you were looking from above - gravity is not needed)
Two objects (50 kg and 35 kg) start together, moving horizontally. They are quickly thrust apart and continue to move along their new trajectories. Object A (50 kg) is now moving at 20 m/s [15o "above" the original pathway] while Object B (35 kg) is moving 42 m/s [40o "below" the original pathway].
What is 24.6 m/s?
A 1 kg mass is on an elastic string with a constant of 250 N/m. It starts from rest at a height of 1.5 m and then is released so that when it reaches the floor, its velocity is zero. The length of the unstretched string is 10 cm.
What is 2.9 m/s?