When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard, the speed of the skateboard
A) decreases.
B) increases.
C) neither decreases nor increases.
Answer: A
You might also like to view...
Faraday's Law: A closed flat loop conductor with radius 2.0 m is located in a changing uniform magnetic field. If the emf induced in the loop is 2.0 V, what is the rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies?
A. 0.16 T/s B. 1.0 T/s C. 0.080 T/s D. 2.0 T/s
Why didn't a planet form in the region of the solar system now occupied by the asteroid belt?
A. It was too cold for a rocky planet to form beyond Mars. B. Orbital resonances with Jupiter disrupted orbits in this region. C. Gravitational encounters with jovian planets kicked most of this material out into the Oort cloud. D. There was never enough material to form a planet.
What are the three sources of heat acted together to bring young Earth to its melting point
What will be an ideal response?
In this photo, a fire extinguisher provides the impulse for a hallway rocket cart. Which is NOT true about the motion of the rocket cart and person?
a. The momentum of the cart and person is equal in magnitude and opposite in direction to the momentum of the expelled gas. b. The cart and person are propelled as a result of gas from the fire extinguisher pushing against air in the room. c. The force of the gas on the cart and person is equal and opposite to the force of the person and cart on the expelled gas.