Unit Test — Unit test Answers

A moving company collects data about couches they move and displays the data in a table. The force along the ramp, the angle of the ramp, and the height the couch is raised from the ground to the platform is shown below. Which statements correctly compare the work done to move the couches? Select three options.

Four landing sites are proposed for a lander. Data about the sites are listed in the table.

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Suppose an object’s initial velocity is 10 m/s and its final velocity is 4 m/s. Mass is constant.What can best be concluded about the object based on the work-energy theorem?

Earth and all of the air in the atmosphere around it make up an incredibly complex system. Energy is constantly changing forms in many different ways.

A spring that has a spring constant of 1400 N/m is stretched to a length of 2.5 m. If the normal length of the spring is 1.0 m, how much elastic potential energy is stored in the spring?

Why is it important to know the direction of the force applied to a moving object and the direction in which the object is moving when determining the work done on the object?

Four different balls are moving at the same velocity. Which will have the greatest kinetic energy as it rolls?

A 60.0 kg object is moving east at 8.00 m/s, and then slows down to 4.00 m/s. How much work was done?

What is the formula for calculating kinetic energy?

The table shows the mechanical energy and velocity of a rock that was thrown four times. The rock has a mass of 2.4 kg.During which trial was the rock the highest above the ground?

The energy transfer diagram represents the energy of a person diving into a pool.

To do work, this truck uses energy stored in chemical fuel and an electrical battery.

Which energy transformation occurs after a skydiver reaches terminal velocity?