In this worksheet, we will practice calculating the kinetic energy of objects of different masses, moving at different velocities.
A motorboat at rest on a lake has a mass of 665 kg. The motorboat then accelerates until it has a kinetic energy of 340 480 J. When the motorboat has accelerated, at what rate does it move toward a stationary boat that is directly in front of it?
A hummingbird has a mass of 40 g. The hummingbird flies in a straight line between two flowers 18 m apart in a time of 12 s. What is the average kinetic energy of the hummingbird while flying between the flowers?
An object has 75 J of kinetic energy and a mass of 1.5 kg. What is the velocity of the object?
An object that has 9 J of kinetic energy is moving at 3 m/s. What is the mass of the object?
An object with a mass of 1.25 kg has a velocity of 12 m/s. What is the object’s kinetic energy?
An object’s kinetic energy when it moves at different velocities is shown in the table. What is the object’s mass in grams?
|Kinetic Energy (J)||0.1||0.4||0.9||1.6||2.5|
The quantity , the velocity of an object, is how much the object changes its displacement from a given position each second. The quantity is the kinetic energy of an object. Which of the following formulas correctly shows the relationship between , , and the mass of the object?
A motorcycle of mass 250 kg moving at 32 m/s has four times as much kinetic energy as a 640 kg mass car. What is the velocity of the car?
An object’s kinetic energy when it moves at different velocities is shown in the graph.
What is the kinetic energy of the object when its instantaneous velocity is 2 m/s?
What is the kinetic energy of the object when its instantaneous velocity is 4 m/s?
What is the object’s mass?