Question

In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.
A. Squeezing a piece of lemon between the fingers to extract its juice.
B. Taking out paste from a toothpaste tube.
C. A load suspended from a spring while its other end is on a hook fixed to a wall.
D. An athlete making a high jump to clear the bar at a certain height.

Answer 1

Hint Agent is who applied the force and object is on which force was applied. Use the definition of all types of forces.

Complete step-by-step solution :
A. Squeezing a piece of lemon between the fingers to extract its juice.
Agent:- In condition (a) fingers is the agent.
Object:-In condition (a) lemon is the object.
When the muscular force exerted by the fingers on the lemon, the effect of this force is the lemon juice being expelled by squeezing.
B. Taking out paste from a toothpaste tube.
Agent:- in condition (b) hand is the agent.
Object:- in condition (b) toothpaste tube is object.
When the muscular force exerted by the hand on the toothpaste tube, the effect of this force is coming out the paste from the toothpaste tube .
C. A load suspended from a spring while its other end is on the hook fixed to a wall.
Agent:- in condition (c) suspended load is the agent.
Object:- in condition (c) spring is the object.
The suspended load exerts a force on the spring, because of that spring stretched.
D. An athlete making a high jump to clear the bar at a certain height.

Agent:- in condition (d) athlete feet are agents.

Object:- in condition (d) ground is object.

When the athlete pushes the ground with his feet, his feet exert a muscular force on the ground. This allows him to jump over the bar because of that his state of motion gets changed.

Note: Student should choose the agent and the object carefully and remember the type of the force acting on it.