Consider the following two cases which involve the motion of an object...
Answer:Case 1: An apple falling from a tree towards the ground
In this case, the apple falls from a tree towards the ground due to the force of gravity. The force of gravity is an attractive force exerted by the Earth on the apple. This force pulls the apple towards the center of the Earth.
Case 2: To move a loaded cart on the horizontal ground
In this case, to move a loaded cart on the horizontal ground, both pulling and pushing forces can be involved.
a) Case 1: Involves pushing of the apple by Earth's gravitational force
This statement is incorrect. The force involved in the motion of the apple in case 1 is the force of gravity, which is an attractive force. Gravity pulls the apple towards the Earth, and it does not involve pushing.
b) Case 1: Involves pulling of the apple by Earth's magnetic force
This statement is incorrect. The force involved in the motion of the apple in case 1 is the force of gravity, not the Earth's magnetic force. The Earth's magnetic force is not significant enough to cause the apple to fall towards the ground.
c) Case 2: Involves the loaded cart to be moved by pulling force only
This statement is incorrect. In the case of moving a loaded cart on the horizontal ground, it can be moved by both pulling and pushing forces. The force applied to move the cart can be in the form of pushing from behind or pulling from the front.
d) Case 2: Involves the loaded cart to be moved by both pulling or pushing force
This statement is correct. To move a loaded cart on the horizontal ground, both pulling and pushing forces can be involved. The force applied to move the cart can be in the form of pulling or pushing depending on the direction in which the force is applied.
In conclusion, the correct answer is option 'D' because both pulling and pushing forces can be involved in moving a loaded cart on the horizontal ground, and the motion of an apple falling from a tree towards the ground is due to the force of gravity, which is an attractive force exerted by the Earth.