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Calculate the force if a 5 kg object accelerates at 2 m/s2
10N
Newton’s First Law is also known as the
Law of Inertia
For every action there is an equal and opposite reaction force
Newton's third law of motion
The force that causes an object to try and resist change
Inertia
is the car tier considered circular motion or rotational motion?
rotational
Identify the specific force providing the centripetal pull in the scenario of the Moon orbiting the Earth.
gravitational force
In what direction does centripetal force always act?
Towards the center of the circle
An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net force
Newton's First Law
when the size and mass of an object increase what also increases with it
The object's Inertia
If you push a wall with a force of 50 N, how much force does the wall exert on you?
The wall exerts an equal and opposite force of 50N.
What is the acceleration of an object with a force of 100N and a mass of 10kg?
10 m/s2
If you are swinging a ball on a string and suddenly release it, will the ball continue to fly in a circle or fly straight? Why?
straight line because of the inertia which is the tendency of an object to move in a straight line
The force of an object is equal to the product of its mass and acceleration.
Newton's 2nd Law
An object that is still will only change if acted upon by what
unbalanced force
Explain why a swimmer moves forward in water.
The swimmer pushes water backward, and the water pushes them forward.
A rocket of mass 2,000 kg experiences a net upward force of 12,000 N. What is the rocket's acceleration? (Ignore air resistance)
6m/s2
According to Newton's Second Law, if you apply the same amount of force to a 10 kg box and a 50 kg box, which one will be easier to move and why?
The 10 kg box will be easier to move because it has less mass, which means it has less inertia and resists the change in motion less than the heavier box
If two ice skaters push off each other, what happens? (direction and force)
They move in opposite directions with equal force.
An object with a lot of inertia is likely to do what
Resist change in movement
A hammer hits a nail with a force of 200N. How much force does the nail exert on the hammer?
The nail exerts an equal and opposite force of 200N on the hammer.
Why don’t the "action" and "reaction" forces in a force pair cancel each other out to create a net force of zero, like balanced forces do?
Unlike balanced forces, which act on the same object, each force in a force pair acts on a different object. Because they act on different objects, they do not cancel each other out
How do you calculate mass given acceleration and force?
Force/acceleration = mass
A car is traveling around a roundabout at a constant speed. According to the sources, is the velocity changing? Is the car accelerating? Why or why not?
Yes, the velocity is changing because velocity depends on both speed and direction, and the car is constantly turning. Because the velocity is changing, the car is accelerating
When a bird flaps its wings downward to lift itself into the air, what are the action and reaction forces?
The action force is the bird pushing air downward with its wings. The reaction force is the air pushing the bird upward.
How do the directions of acceleration, force, and velocity relate in circular motion?
The direction of acceleration is the same as the force (toward the center), while velocity acts perpendicular to both