Presentation on theme: "Physical Science This test covers what you learned in Unit 1 including: ◦ Contact and Non-Contact Forces ◦ How to measure motion (speed and velocity)"— Presentation transcript:
This test covers what you learned in Unit 1 including: ◦ Contact and Non-Contact Forces ◦ How to measure motion (speed and velocity) ◦ Balanced and unbalanced forces ◦ Newton’s Laws of Motion Quiz yourself by going through the slides. To check your answer or get to the next question, click on the balloon car. Good Luck!
The amount of matter in an object is called? a. Weight b. Mass c. stuff
What do you call a force that gravity exerts on an object’s mass? a. Magnetism b. Friction c. Weight
What is a force that acts to pull pairs of objects together? a. Gravity b. Magnetism c. electricity
The tendency for an object to stay in motion or to stay at rest is called? a. acceleration b. friction c. inertia
Important uses of friction: a. Walking – you couldn’t walk without friction between your shoes and the ground. b. Writing – you couldn’t hold a pencil without friction. c. Driving a car – you couldn’t move without friction between the tires and the road. Problems from friction: a. Makes movement difficult. b. Wastes energy – in a vehicle - excess friction means extra fuel is needed. c. Wears things out – machines with moving parts can wear out due to friction. Lubrication such as oil can reduce friction.
Newton’s Second Law of Motion Force = mass x acceleration
Newton’s First Law of Motion Also known as the Law of Inertia