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Ch3 Unit Test
9th grade Physical Sci.
| Question | Answer |
|---|---|
| The upward force exerted on an object is______. | Air Resistance |
| The path of a projectile is_______. | It is always curved |
| When an object moves in a circular path it accelerates toward the center of a circle as a result of_______. | Centripetal Force |
| The amount of gravitational force between objects depends on their______. | Mass and distance between them |
| The statement to every reaction there is an equal and opposite reaction is______. | Newton's third law of motion |
| In the absence of air a penny and a feather dropped from the same height will blank______. | They fall at the same rates.. |
| A feather will fall through the air more slowly than a brick because of______. | Air Resistance |
| An object that is in free fall seems to be______. | Weightless |
| The relationship among mass, force, and acceleration is expanded by______. | Newton's second law of motion |
| When two objects collide their momentum after the coalition is explained by______. | Conservation of momentum |
| The motion of an object parallel to earth's surface is_____. | Horizontal |
| A real car moving at 10kg\h has more momentum than a toy car moving at the same rate because_____. | It's mass is greater |
| If a 300 newton action force is exerted to the right the reaction force will be_____. | 300 newtons to the left |
| Acceleration due to gravity is______. | 9.8 m/s2 |
| When a force is exerted on an object an equal and opposite force is exerted by the object these forces are referred to as_______. | Action and Reaction Force |
| According to Newton’s second_____. | F=M x A |
| Friction between the tire of a moving car and the dry pavement is_____friction | Rolling |
| The international space station is a_____satellite. | Artificial |
| A car rounding a curve is subject to_____force. | Centripetal |
| Gravity is one of_____basic forces. | Four |
| MV= | P |
| P/M= | V |
| P/V= | M |
| MA= | F |
| F/A= | M |
| F/M= | A |
| What is the force on an object with a mass of 10kg and acceleration of 5m/s2. | 50kg x m/s2 |
| Calculate the acceleration of a 20kg object that is moved with a force of 200 N. | 10m/s2 |
| What is the mass of an object that is accelerating at 10m/s2 when a force of 300N is exerted. | 30kg |
| Air resistance is greater on a_______object. | flatter |
| Gravity acting during daily life is_______. | Jumping and dropping something |
| How is mass different from weight? | Mass is the amount of matter in an object and weight is the gravitational force on an object. |
Created by:
P.V.A.