Question

What are the force/forces acting and effect of force in d following activities
1.Moving of a toy cart wheel forward
2. Stretch a spring
3. Drop a coin
4. Squeexe the tooth paste
5. Make a parachute with the help of paper and string and drop it

Answer 1

1. Frictional force and muscular force
2. Muscular force
3. Gravitational force
4. Muscular force
5. Gravitational force and air resistance.

Answer 2

In all cases, gravitational force is acting.

1) Here, force of friction from surface is there, which resists motion. There is also resistive drag from air, which also resists motion. There is normal force (electromagnetic) from ground, which keeps the toy on the ground.

(If you are a higher secondary or college student: if the toy is moving fast along any longitude of the earth, then there's the Coriolis Force acting on it)

2) Here, there exists a restoring force within the spring, which tries to bring back the spring to its original length.

3) Here, gravity is there which accelerates the coin towards the center of the earth.
There is also the viscous and resistive drag force from air, which tries to slow down the coin.

4) Here again both gravity and resistive viscous force of air are present. But the resistive force from air is a lot more here, which largely slows down the parachute.