Collisions
What "base" formula can you use to solve elastic collision problems with two objects?
m1v1+ m2v2 = m1v3+ m2v4
formula for GPE
What is GPE=mgh
The formula for kinetic energy.
What is 0.5mv2?
While he and his family are moving, Joshua drags his suitcase 12.64 m from the front door to the car at a constant speed of .43 m/s. He does this with a horizontal force of 87.0 N. How much works does he do to over come friction?
What is 1100 J
What formula represents the work-energy theorem?
Worknet = Δ KE
What "base" formula can you use to solve inelastic collision problems?
m1v1+ m2v2 = (m1+ m2)v3
Is GPE different in space? How do you know?
Yes, because the strength of the gravitational field will vary as you travel farther way from the surface of the Earth.
Define kinetic energy.
What is "moving" energy?
**accepts all answers that include mentions of motion**
If Aimee does 5.1 J of work to move her dresser drawer a distance of 2.3 m, how much force did she have to exert?
What is 2.2 N
Violet pulls a rake horizontally on a frictionless driveway with a net force of 2.0 N for 5.0m. How much kinetic energy does the rake gain?
What is 10 J?
What is 16.7m/s?
A mountain climber has a potential energy of 1,215,200 J. If the climber is on Earth and has a mass of 62 kg, then what is her altitude?
What is 2000 meters.
A 4 kg ball is pushed off a ledge. How much kinetic energy will it have just before hitting the ground if it is traveling 10m/s?
What is 200 J
What is the formula for work when the force is exerted at an angle that is not equal to 90 degrees or 0 degrees.
W= Fdcos(theta)
A truck accidentally rolls down a driveway for 8.0 m while a group of people push against the truck with a force of 850 N.
What is the change in kinetic energy for the truck?
What is -6800 J?
Spongebob and Patrick go jellyfishing and collide in the meadows. SpongeBob has a mass of 3 kg and Patrick as a mass of 12kg. If SpongeBob is running at 10 m/s initially and comes to a stop when they collide and Patrick is running at 2 m/s in the opposite direction initially, then what is Patrick's speed after this inelastic collision?
What is 0.5m/s?
A rock is lifted 10m off of the ground, carried by the person holding it across a field of length 100m, and held at a final height of 10m. What was the change in gravitational potential energy?
What is 0 J.
A person has a kinetic energy of 88 J at the roller skating rink and a mass of 45 kg , how fast is the person skating?
What is 2 m/s
Calculate how much work was done if an object is pulled at an angle of 47 degrees along a 6 m path with a force of 13 N.
What is 53 J
A flying squirrel travels at a velocity of 8.9 m/s and has a mass of 0.5kg. If it travels a distance of 30 meters from rest. How much force has it exerted over this distance?
What is 0.66 N?
Ms. Myricks was running late to first period class and is fast walking to Clark at 1.5 m/s. She has a mass of 40kg and is carrying a bag with a mass of 4kg. While walking she drops her bag. What is Ms. Myricks' velocity after dropping the bag if momentum is conserved?
What is 1.7 m/s?
The acceleration due to gravity on the moon is 1.62 m/s². How much more potential energy does someone have on Earth in comparison to the moon if they have a mass of 70kg and are 100m off the ground?
What is 57,260 J.
Jerry the mouse runs a 21m/s from Tom the cat and using 140J of kinetic energy, what is the mass of the Jerry?
What is 0.63kg
Person A and Person B are competing against each other, they both can lift 75 kg boxes 3.5 m off of the ground. Person A lifts her box in 1.5 s and Person B lifts his box in 2.4 s. Which person does more work??
What is NEITHER
A Lamborghini speeds through a stop sign with a mass of 354kg. If it does 28,3200J of work then what is the speed of the Lamborghini?
What is 40 m/s?