Gravitational Forces and Contact Forces in Physics

Distance

In the table, which two forces are balanced? A) Q and R B) R and S C) S and T D) T and U

Relationship between Gravitational Force and Distance

What relationship between gravitational force and distance is shown in the graph above? A) decreases; decreases B) decreases; stays the same C) increases; decreases D) increases; stays the same

Net Force

Based on the data, which pair of forces produces the greatest net force in any direction? A) Q and R B) R and S C) S and T D) T and U

Gravitational Force

As the distance between two objects increases, what happens to the gravitational force? A) increases B) decreases C) creates friction D) stays the same

Contact Force

Which sentence below describes a contact force? A) A baseball bat hits a ball B) A book falls to the floor C) A leaf floats in the air and falls to the ground D) A magnetic force pulls a paper clip toward a magnet

Static Friction

Adam and Natalie push on a cart using 150 N of force. The cart does not move. What is the static friction on the cart? A) 150 N B) -100 N C) 0 N D) 150 N

Final answer:

The gravitational force between objects decreases with increasing distance. Contact forces, like when a baseball bat hits a ball, require direct physical interaction. If two people apply 150 N of force to a cart and it doesn't move, then the static friction on the cart is also D) 150 N.

Explanation:

Analysis of Forces

The question pertains to the analysis of forces, particularly gravitational force and its correlation to distance, as well as the concept of contact forces. From the given information, we can deduce that the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This concept is based on Newton's law of gravitation. With an increase in distance, the gravitational force decreases.

Contact Forces

Contact forces necessitate direct physical interaction between objects. An instance of this would be when a baseball bat makes contact with a ball, which is a direct consequence of physical interaction.

Static Friction

Regarding the scenario where Adam and Natalie exert 150 N of force on a stationary cart, causing it not to move, the static friction opposing that force must also measure 150 N. Static friction matches the applied force until the point of movement.

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