Considering only the initial and final situations, identify which mechanical energies have changed. In addition, determine whether you will need to consider any work done by external forces or changes in thermal energy.

Check all that apply.
A) Kinetic energy has changed.
B) Gravitational potential energy has changed.
C) Spring potential energy has changed.
D) Work by external forces on the system must be considered.
E) Thermal energy of the system has changed.

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.