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Laws of Motion
| Question | Answer |
|---|---|
| Galileo found that a ball rolling down the one inclined plane would roll how far up the other inclined plane? | To nearly half its original height |
| The law of inertia applies to | Both moving and nonmoving objects |
| After a cannonball is fired into frictionless face the amount of force needed to keep it going equals | Zero, since no force is necessary to keep it moving |
| If the force of gravity suddenly stopped acting on the planets they would | Move in a straight line a tangent to their orbits |
| A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly the reason this can be done is | The milk carton has inertia |
| One object has twice as much mass as another object the first object also has twice as much | Inertia |
| Compared to its weight on earth, a 10 kg object on the moon would weigh | Less |
| Compared to its mass on earth, The mass of a 10 kg object on the moon is | The same |
| The mass of a sheep that weighs 110 N is about | 11 kg |
| The force required to maintain an object at a constant speed in free space is equal to | Zero |
| Friction | -acts in a direction that opposes the motion of an object -Is the name given to the force acting between surfaces sliding past one another -Comes from microscopic bumps that act as obstructions to the objects motion |
| A 15 N force and A 45 N force acts on an object in opposite directions what is the net force on the object | 30 N |
| Equilibrium occurs when | â All of the forces acting on an object are balanced â The net force on the object is zero â The sum of the X forces on an object equals the sum of the negative X forces â The sum of the upward force equals the sum of the downward force |
| What would be the safest way to put up a clothesline | With some slack in the line |
| A girls his weight is 500 N hangs from the middle of a bar supported by two vertical strands of rope. What is the tension in each strand | 250 N |
| Friction is a force that always acts | Opposite to an objects motion |
| What is the maximum resultant possible when Adding a 2 N force to an 8 N force | 10 N |
| The weight of a person can be represented by a vector that acts | Straight down even if the person is standing on a hill |
| A clothesline a stretch between two trees attire hangs in the middle of the line and the two halves of the line make equal angles with the horizontal. The tension in the line is | More than half the tires weight |
| Which has more mass, a kilogram of feathers or a kilogram of iron | Neither â they both have the same mass |
| How much does a 3 kg bag of bolts weigh in newtons | 29.4 N |
| A bag of sports equipment has a mass of 10 kg and a weight of | 98 N |
| A 5 N force and a 30 N force act on the same object in the same direction. What is the net force on the object | 35 N |
| What is the minimum resultant possible when adding a 5 N force to an 8 N force | 3 N |
| Accelerations are produced by | Forces |
| How does acceleration of an object change in relation to its mass? It is | Inversely proportional |
| The acceleration produced by a net force on an object is | In the same direction as the net force, directly proportional to the magnitude of the net force, inversely proportional to the mass of the object |
| When an object reaches its terminal velocity itâs acceleration is | 0 m/s squared |
| A 10 kg brick in a 1 kg book or dropped in a vacuum. The force of gravity on the 10 kg brick is | 10 times as much as the force on the 1 kg book |
Created by:
alyssapetski