Physical Science Unit 3.4 -3.6 Motion and Forces Semester Review

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What is Inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force.

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What is Horizontal Velocity?

Back

Horizontal Velocity is the speed of an object moving parallel to the ground. It is the component of velocity that describes motion in the horizontal direction.

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What is Vertical Velocity?

Back

Vertical Velocity is the speed of an object moving up or down. It is the component of velocity that describes motion in the vertical direction.

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What is Gravity?

Back

Gravity is the force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

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What is the Path of a Projectile?

Back

The Path of a Projectile is the trajectory that an object follows when it is thrown or propelled, influenced by gravity and its initial velocity.

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What does Newton's 1st Law state?

Back

Newton's 1st Law states that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by a net external force.

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What does Newton's 2nd Law state?

Back

Newton's 2nd Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

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What does Newton's 3rd Law state?

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Newton's 3rd Law states that for every action, there is an equal and opposite reaction.

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What is a Free Body Diagram (FBD)?

Back

A Free Body Diagram (FBD) is a graphical representation used to visualize the forces acting on an object, showing all the forces and their directions.

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How does weight differ on Earth and Mars?

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Weight is the force of gravity acting on an object. An object's weight changes depending on the gravitational pull of the planet it is on; thus, a 13,000 lb elephant would weigh less on Mars than on Earth.