A Rocket Burns Fuel To Create Hot Gases That Explode

Question: How can you find the average acceleration of an object?

Answer: Subtract the initial (start) velocity from the final velocity and divide by the change in time

Question: What is the unit of force in the metric system?

Answer: Newton

Question: What type of motion is produced by an inward, or center directed net force?

Answer: curved or circular motion (centripetal acceleration)

Question: When a racecar accelerates on a level track, which kind of energy does it gain?

Answer: kinetic energy

Question:

Answer: The moon is closer to the Earth than the sun and has a greater pull with the Earth’s gravity.

Question: Imagine a box floating in space. The following picture shows all the forces acting on this box. What is the vertical force on this box? USE THE PICTURE TO HELP ANSWER

Answer: 50 N upward

Question: A cart is moving in a straight line. You studied the effects of velocity and acceleration on this cart. In which trail did the speed of the cart increase?

Answer: Trial 3

Question: When a ball is thrown into the air, it follows a curved path. At which point does the ball have the greatest amount of gravitational potential energy? USE PICTURE TO HELP ANSWER.

Answer: Point B; this is the point that is the farthest from the ground

Question: An experiment is conducted with a radio controlled car. The sketches show the findings. What is the average acceleration of the car?

Answer: A= 5 m/s2

Question: A rocket burns fuel to create hot gases that explode violently out of the rocket engine. This explosion creates thrust. Thrust is a force that pushes the rocket upward. What force must thrust overcome to send the rocket into space?

Answer: Gravity acting on rocket