F
—- = *A*
*m*
Cannon:
F
—- = a
*M*
The action is: Earth pulls on Moon. What is the reaction?
Moon pulls on Sun.
Moon pulls on Earth.
Earth pushes on Moon.
Moon pushes on Earth.
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
-Both pulls are the same.
-Moon’s pull
-Earth’s pull
*Give an explanation*
Since the Moon pulling on the Earth and the Earth pulling on the Moon are a reaction pair, the strengths of the two forces must be equal to each other.
-The cannon’s acceleration is not lower than the shell’s acceleration;
-The cannon has more mass than the shell.
-Not as much force is applied to it.
*Give an explanation*
Since the cannon has more mass than the shell, it will have a lower acceleration because both objects experience the force. This can be understood from Newton’s second law (a=F/m).
*Give an explanation*
Newton’s second law can be applied to each of the objects. In fact, this explains why the two objects can have different resulting accelerations, resulting in movement.
-The horse is pulling on the cart with a stronger force than the cart is pulling back on the horse.
-Friction from the ground on the horse is stronger than the sideways force the horse is exerting on the ground.
-The force of friction the ground exerts on the horse is larger than the force the cart is pulling back on the horse.
*Give an explanation*
The net force exerted on the horse must be to the right if the horse accelerates to the right. The only two horizontal forces acting on the horse are friction (pushing forward) and the cart (pulling backward), so the friction force must be stronger.
-There can never be only one force acting on an object.
-Every force has an opposite and equal reaction.
-All forces come in pairs.
-No force can exist on its own.
*Give an explanation*
Newton’s third law doesn’t specify how many forces can act on any one object (it just states that each of the forces will have a reaction force acting on other objects).
*Give an explanation*
The magnitudes of the two force vectors are equal, and the vectors are pointed in opposite directions.
-is slightly larger in amplitude than the action force.
-is slightly smaller in magnitude than the action force.
-always acts in the same direction.
-is exactly equal in magnitude.
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
-air resistance against the bow.
-friction of the ground against the archer’s feet.
-grip of the archer’s hand on the bow.
-combined weight of the arrow and bowstring.
-arrow’s push against the bowstring.
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
-weight of the ball.
-grip of the player’s hand against the ball.
-air resistance on the ball.
-force that the ball exerts on the bat.
-weight of the bat.
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the
-pull of the ball’s mass on the Earth.
-acceleration of the ball.
-air resistance acting against the ball.
-none of these
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
-zero.
-250 N.
-1000 N.
-500 N.
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
-Suzie, surprisingly.
-Arnold, of course.
-both the same, interestingly enough.
*Give an explanation*
Because newton’s third law works just as well for the tension of a rope, when suzie pulls the rope from Arnold Strongman they both put an opposite and equal reaction on the rope
-same for both.
-Volkswagen.
-Mack truck.
*Give an explanation*
because although they exert the same amount of force on each other, the volkswagen has less mass, which according to newton’s second law would cause that same force to move it at a higher velocity than the truck.
-greater on the bug.
-the same for both.
-greater on the car.
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
even though the two objects may be going different velocities after the collision, they still exerted the same amount of force on each other.
-zero
-800 N
-600 N
-400 N
-none of these
*Give an explanation*
If you pull the rope with 400 N of force and your friend pulls on the other side , there isn’t any *acceleration*.
With what force your friend is pulling
4 m.
6 m.
0 m.
3 m.
*Give an explanation*
you cannot pull ‘twice as hard’ on something without feeling that same force act on you .. action and reaction being equal and opposite in every case.
Both people have the same force act on them .. but the person with twice the mass accelerates forwards with just half the acceleration of the other person (a = F/m).
This means that 2m moves only ½ the distance that 1m moves in the same time.
2m moves 1/3 of the distance while 1m moves 2/3 of 12 m
second law.
first law.
law of gravitation.
third law.
none of these
road.
tires.
engine.
air.
none of these
*Give an explanation*
every object has an opposite and equal reaction on another object according to newton’s 3rd law
The car tires produces an action force on the road, and the car moves forward from the friction of the road exerting a reaction force on the tires
*Give an explanation*
*Give an explanation*
This means a given force exerted on a small mass produces a large acceleration, on the other hand the same force exerted on a larger mass produces a smaller acceleration.
The action reaction force is when the ball applies force onto bat.
The ball exerts force on the earth, by pulling the earth up toward it.
