easy questions
what is force?
in physics, a force is any interaction that, when unopposed, will change the motion of an object.
The driver of a pickup truck is traveling north at 20m/sec and suddenly stops. In which direction will a suitcase lying in the back of the truck move?
towards the front
what is an unbalanced force?
When two forces acting on an object are not equal in size, we say that they are unbalanced forces.
what is a balanced force ?
When two forces acting on an object are equal in size but act in opposite directions, we say that they are balanced forces
A ball is rolling to the east. It is given a quick kick to the north. After the kick it does what ?
it keeps rolling but changes its direction.
what is a similar word to velocity
speed
What is difference between balanced and unbalanced force ?
If two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced. An object is said to be acted upon by an unbalanced force only when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction.
Two football linemen push against each other in practice. They do not move, but then lineman B moves forward and lineman A moves backward. what is the net force?
the net force is zero. ... When the lineman push on each other, they cause action-reaction forces that are unequal.
If the people on each side of the rope are pulling with the same strength, but in the opposite direction, the forces are ?
balanced
A wagon is being pulled in a straight line. The forces exerted on the wagon are balanced. The wagon does what?
the wagon moves with a constant speed.
is a car a balanced force?
We have said that if we use a greater force we can make it speed up (accelerate). ... If we push the car we make it move because our push is greater than the other forces acting upon it. If, on the other hand, an object is moving at a constant speed in a straight line then again the forces are said to be balanced.
A car moves along a road that has markers every kilometer. Over time, the car passes the markers in shorter periods of time. Which statement best describes the motion of the car?
The car is keeping the same direction.
Two equal forces act at the same time on the same stationary object but in opposite directions. Will it or will it not change direction?
It will change direction.
Imagine two identical low friction cars. One car has a larger constant force exerted on it than the other. Which car speeds up more quickly?
Car A speeds up more quickly because it has a larger force exerted on it.The larger the force exerted on an object, the more quickly it will speed up or slow down.
Is gravity a balanced force?
Consider another example involving balanced forces - a person standing on the floor. There are two forces acting upon the person. The force of gravity exerts a downward force. ... Since these two forces are of equal magnitude and in opposite directions, they balance each other.
what can unbalanced forces do?
Unbalanced forces can lead to a change in direction, a change in speed, or both a change in direction and in speed
How do things move if the forces are balanced?
Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced.
Newton's 1st Law says that an object in motion stays in motion at a (constant or inconstant speed), and an object at rest stays at rest, unless acted upon by an (balanced or unbalanced) force.
constant & unbalanced force.
What do unbalanced forces cause
Unbalanced forces are not equal, and they always cause the motion of an object to change the speed and/or direction that it is moving. When two unbalanced forces are exerted in opposite directions, their combined force is equal to the difference between the two forces.
how can you find unbalanced forces?
Unbalanced forces can lead to a change in direction, a change in speed, or both a change in direction and in speed
why are balanced forces important?
It is important to note that an object can be in motion even if there are no forces acting on it. ... The forces pulling down and pulling up can be said to be in balance.
Two identical low friction cars are filled with different amounts of wood. Car A has a much greater mass than car B. Both cars are given the same initial push. Which car slows down faster?
Car B slows down faster because it has less mass.