Beginning at time t = 0, a student pushes on a 30 kg crate, causing it to move at a constant velocity of 1.2 m/s toward an elevator door located 16 m away, as shown above. At t = 4.0 s, the elevator door opens and remains open for 5.0 s. The student immediately pushes harder on the crate causing the crate to accelerate uniformly towards the elevator door. The front of the crate reaches the elevator door just as it starts to close. a) How far is the crate from the elevator door at t = 4.0 s? b) Calculate the magnitude of the crate’s acceleration from the time the student began pushing harder on the crate until the front of the crate reached the front of the elevator door. c) Calculate the magnitude of the crate’s velocity the moment the front of the crate reached the front of the elevator door. d) On the axes below, sketch the graphs of the acceleration a, velocity v, and position x of the crate versus time between t = 0 and the time the front of the crate reaches the elevator.

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

the answer is a. hope this .

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.