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- Multiple ChoicePlease save your changes before editing any questions.Which of the following objects has the most kinetic energy?A 20 kg toddler running at 5 m/sA 50 kg toddler running at 30 m/sA 90 kg toddler running at 30 m/sA 100 kg toddler running at 2 m/s
- Multiple ChoicePlease save your changes before editing any questions.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?Potential EnergyKinetic EnergyNuclear EnergyChemical Energy - Multiple ChoicePlease save your changes before editing any questions.Which position has the most kinetic energy?AGDB
- Multiple ChoicePlease save your changes before editing any questions.Which position has the most potential energy?AGCD
- Multiple ChoicePlease save your changes before editing any questions.Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?4100 J3100 J5100 J8100 J
- Multiple ChoicePlease save your changes before editing any questions.A pendulum is released from point C. Which statement is correct as it swings from C to A?The PE increases and KE decreasesThe KE increases and PE decreases.The PE is maximum at A.The KE is maximum at C and B.
- Multiple ChoicePlease save your changes before editing any questions.How much work is done carrying a 10-N box horizontally across a floor for 8 m?80 J10 J8 J0 J
- Multiple ChoicePlease save your changes before editing any questions.
You do work against gravity when you walk up some stairs.
True
False
- Multiple ChoicePlease save your changes before editing any questions.
You do work when you glide (not pushing) across the ice while ice skating.
True
False
- Multiple ChoicePlease save your changes before editing any questions.A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?2000 Joules19,600 Joules19,600 m/s31.3 m/s
- Multiple ChoicePlease save your changes before editing any questions.When a 65 kg skydiver jumps from a plane, her speed steadily increases until air resistance provides a force that balances the force due to free fall. How fast is the skydiver falling if her kinetic energy at the moment is 704000J?21661.53 m/s147.17 m/s22880.0 km/s10830.76 m/s
- Multiple ChoicePlease save your changes before editing any questions.
Energy stored in a compressed spring is
kx
kx2
1/2 kx2
mgh
- Multiple ChoicePlease save your changes before editing any questions.At which point(s) on the roller coaster is the kinetic energy at its maximum?ABCD
- Multiple ChoicePlease save your changes before editing any questions.How do you calculate power?P = W/tP = E/tP = w * tP = bbq/chicken
- Multiple ChoicePlease save your changes before editing any questions.How do we calculate work?W = F * dw = f * DW = F * Dw = f * d
- Multiple ChoicePlease save your changes before editing any questions.How much work is being done with 200 N of force over 426 meters?85,200 J45,620 J90,480 J62,329 J
- Multiple ChoicePlease save your changes before editing any questions.What is the formula for Kinetic Energy?PE = m*g*hKE = 1/2m*v2W = F*dP = W/t
- Multiple ChoicePlease save your changes before editing any questions.What is the energy of position or shape that depends on weight and height, also called stored energy?EnergyKinetic energyPotential energySound energy
- Multiple ChoicePlease save your changes before editing any questions.Why does the total amount of mechanical energy stay constant in a system?energy is not created or destroyedenergy leavesenergy entersenergy is not converted from one form into another
- Multiple ChoicePlease save your changes before editing any questions.What is the formula for calculating the total amount of mechanical energy?ME = KE + PEKE = ME + PEPE = KE + MEME = 1/2 mv2
- Multiple ChoicePlease save your changes before editing any questions.Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s.18 J36 J12 J6 J
- Multiple ChoicePlease save your changes before editing any questions.At which point is potential energy greatest?WXYZ
- Multiple ChoicePlease save your changes before editing any questions.At which point is kinetic energy greatest?WXYZ