1. B
2. I do not understand, forces on wall and ground are not the same magnitude in general.
3. D
4. D but it is true the whole time, third law
5. A Once again Newton's third law
1) A baseball thrown by a pitcher is hit by a batter. At the moment when the ball hits the bat, the force exerted on the bat by the ball is Fball on bat and the force exerted on the ball by the bat is Fbat on ball. The relationship between these forces is
A) Fball on bat > Fbat on ball
B) Fball on bat = -Fbat on ball
C) Fball on bat < Fbat on ball
D) Fball on bat = Fbat on ball
2) As a ladder leans against a wall it exerts a force on both the wall and ground. What are the two reactant forces on the ladder?
A) -F wall on ladder and -F ground on ladder
B) -F wall on ladder and F ground on ladder
C) F wall on ladder and F ground on ladder
D) F wall on ladder and -F ground on ladder
3) How can Newton’s laws explain why the brain is in danger of injury when there is impact to the head?
A) the blood vessels of the brain expand, so more blood flows to the brain
B) The brain moves inside the skull with a force equal and opposite to that of the impact
C) The blood vessels of the brain shrink, so less blood flows to the brain
D) The brain is fixed in one place inside the skull and cannot move away from the impact
4)While you push a box you begin to decrease the force you are exerting on the box. When will the box reach equilibrium?
A) when the force of the box becomes Fyou on box < Fbox on you
B) when the force you are exerting on the box is equal to 0
C) the box will never reach equilibrium
D) when the Fyou on box = -Fbox on you
5) Nina and John are practicing an ice skating routine. Nina is standing still. John, who is twice as heavy as Nina, skates toward her, pushing Nina away with force f. Assuming the system is closed, which statement is correct about this syestem?
A) Nina experiences a force equal to f
B) Nina experiences a force equal to f/2
C) Nina experiences a force equal to 2f
D) Nina experiences a force equal to f^2
8 answers
Are their answers right?
1. b
2. a
3. b
4. b
5. a
correct answers! hope this helped.
2. a
3. b
4. b
5. a
correct answers! hope this helped.
1. fball on bat = -fbat on ball
2.-fwall on ladder and -fground on ladder
3.brain moves insude skull
4.equal to 0
5. force equal to f.
2.-fwall on ladder and -fground on ladder
3.brain moves insude skull
4.equal to 0
5. force equal to f.
1. Fball on vat =-Fbat on ball
2. -Fwall on ladder and -Fground on ladder.
3. The brain moves inside the skull with a force equal and opposite to that of the impact.
4. When the force you are exerting on the box is equal to 0.
5. Nina experiences a force equal to f.
2. -Fwall on ladder and -Fground on ladder.
3. The brain moves inside the skull with a force equal and opposite to that of the impact.
4. When the force you are exerting on the box is equal to 0.
5. Nina experiences a force equal to f.
still 100% right as of 2022!
thx
thx
anon and anonymous are 100% right
dont trust answers that are just letters because they can get mixed around on different people's tests. Anyways the first anonymous with 20+ likes is fully right
11 answers