Answer to Question #96975 in Mechanics | Relativity for Musah fuseini

Question

Describe one "Newton's third law pair" of force involved in the following situations. In each case, state the object each force acts on. the type and direction of the force.
(a) you step on someone's toe
(b) a car hits a brick wall and comes to rest.
(c) a car slow down by applying the brakes.
(d) you throw a ball upward into the air.

(1)
A parachutist weighs 100N. When she opens her parachute, it pull upward on her with a force of 200N.
(a) draw a diagram to show the forces acting on the parachutist.
(b) calculate the resultant forces acting on the parachutist
(c) what effect will this forces have on her?

Answer 1

(a) Action-The force of your feet on the other person toe (Direction :downward)

Reaction - The force the toe applied on your feet (Direction :upward)

(b) Action- The force applied by the car on the wall (direction: towards the wall)

Reaction - The reaction force applied by the wall on the car (direction: towards the car)

(c) Action- The force of friction the tires exert on the road, that makes the car slow down(direction: forward)

Reaction - The reaction force exerted by the road on the tires, which is also a force of friction(Direction :backward)

(d) Action- The force you apply on the ball when throwing it (direction: upward)

Reaction - The reaction force the ball exerts on your hand (direction: downward)

(a)

$$\underset{100\ N}{\underset{\downarrow}{\overset{200\ N}{\overset{\uparrow}{Parachutist}}}}$$

(b) Resultant force = 100 N Direction :upward

(c)

This force will have the net upward force on the parachutist .