-1.07 1.07 2 3 4 5 Time (s) A cart of mass 2.0 kg on a horizontal surface is attached to a horizontal spring of negligible mass. A 1.0 kg block is secured on top of the of the 2.0 kg cart The other end of the spring is attached to a wall, and there is negligible friction between the cart-block-spring system and the horizontal surface The cart-block-spring system then experiences simple harmonic motion as described by the graph that shows the velocity of the cart block system as a function of time. The maximum spring potential energy of the cart-block-spring system is most nearly A. 0.32 J
B. 0.64 J
C. 0.96 J
D.1.92 J​

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h ≈ 10 m 2. h ≈ 50 m 3. h ≈ 30 m 4. h ≈ 40 m 5. h ≈ 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 × 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.