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Physics M5-M6
| Question | Answer |
|---|---|
| Which law of motion explains why it is harder to push a heavy object than a light one? | Newton's Second Law |
| According to Newton's laws of motion, what happens to an object in motion if no external forces act on it? | It continues to move at a constant velocity |
| A brick slides on a horizontal surface. Which of the following will increase the magnitude of the frictional force on it? | Putting a second brick on top |
| What is the term used to describe the tendency of an object to resist changes in its motion? | Inertia |
| A mass sliding down a frictionless inclined plane has how many forces in its FBD? | 2 Gravity The weight of the object pulling straight downward toward the center of the Earth. Normal Force The supporting force exerted by the surface of the ramp, acting perpendicular to the incline. |
| If a net force is applied to an object, what may happen to its motion? It will change direction It will slow down It will speed up Any of the choices | Any of the choices |
| According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by what? | External force |
| When an object is in equilibrium, the net force acting on it is equal to what? | Zero |
| Which law of motion explains why a person is pushed backward when a car accelerates suddenly? | Newton's First Law |
| What is the SI unit for force? | Newton (N) |
| What is the term for the force of attraction between two objects with mass? | Gravity |
| What is the relationship between force, mass, and acceleration according to Newton's second law of motion? | Force = mass x acceleration |
| According to Newton's third law of motion, for every action, there is an equal and opposite what? | Reaction |
| Which law of motion explains why a soccer ball keeps rolling after being kicked? | Newton's First Law |
| Newton's second law of motion states that the acceleration of an object is directly proportional to what? | The net force acting on it |
| What is the term for the force that opposes the relative motion of two surfaces in contact? | Friction |
| If an object is moving at a constant speed in a straight line, what can you conclude about the net force acting on it? | The net force is zero |
| If you push a wall with force equal to 59 N, what must be the magnitude of the force (in Newtons) exerted by the wall to you? |
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