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PS 08 Force & Moti
8th Grade 2022
Question | Answer |
---|---|
A change in an objects position over time. | Speed |
Two factors that determine the speed of an object. | The distance traveled and the time it takes. |
Speed with direction | Velocity |
The change in velocity over time. | Acceleration |
Any push or pull on an object. | Force |
Which of Newton's laws states that objects at rest stay at rest, and objects in motion stay in motion, unless acted on by an outside force. | Newton's 1st Law |
The amount of matter in an object. | Mass |
Units for force and weight. | Newton |
Units for mass in the metric system | gram |
The force of gravity acting on a mass. | Weight |
The use of force to move an object some distance. | Work |
How do simple machines make work easier? | 1. They reduce the amount of force necessary to do the work. 2. Change the direction the the force applied. |
The rate (how fast) at which work is being done. | Power |
The units for work. | Joules |
Which of Newton's laws states that the greater the mass of an object, the greater the force needed to accelerate it. | Newton's 2nd Law |
Which of Newton's laws states "For every action, there is an equal and opposite reaction force"? | Newton's 3rd Law |
The units for power. | Watts |
What are the 6 simple machines? | Wedge, Pulley, Inclined Plane, Screw, Wheel & Axle, and Level |