Force and Motion

Review

What is the distance traveled by this object?

6 + 4 + 3.5 = 13.5 Km

What is the net force acting on the following object?

• 12 + 8 – 4 = 16 N to the right

Which of the following represents an inelastic collision?

• A (inelastic collision: masses are combined)

A

B

Which of the following is a scalar?

• A. Velocity• B. Acceleration• C. 42 m/s to the right• D. Speed• E.

D. Speed only give magnitude not direction

What does the following graph represent?

• Decreasing speed or deceleration

Which Newtonian term is used to describe the following situation?

• Inertia: Newton’s First Law of Motion

A speedometer gives the driver what information?

• A. Average speed• B. Instantaneous speed• C. Average velocity• D. Overall acceleration

Instantaneous Speed

What is the displacement in the following illustration?

• Zero Displacement: The runner finished where they started.

1 lap = 400 meters

What formula could be used to find the objects displacement?

Which graph would represent the acceleration due to gravity alone?

• B: Constant Acceleration 9.81 m/s2

Satellites like the ones used for GPS and our moon are subject to the force of

gravity alone. These objects are said to be experiencing…

• A. Terminal Velocity• B. Instantaneous Acceleration• C. Free Fall• D. Universal Law of Gravitation

Free Fall

What force is represented by the green arrow?

• Normal Force

Force is labeled in what unit of measure?

• Newton's (N)

The brown box in the second diagram is providing what type of

force on the tennis ball?

• Centripetal Force

What (2) forces must be balanced to keep a satellite in orbit?

• Inertia • Gravity

Determine the cars average speed.

• Speed = distance / time• 5 miles / .2 hrs = 25 mph

What type of friction would the following object most likely experience?

• Rolling Friction

Why is the velocity of the (2) astronauts less than the velocity of

the (1)?

• Increase in mass.• Momentum = Mass x Velocity

For an object to accelerate, it must experience…

• A. Balanced forces• B. Unbalanced forces• C. Gravity• D. Terminal Velocity

Unbalanced Forces

A projectile is an object upon which the only force acting is gravity.

• What is the shape that describes the motion of a projectile?

Parabolic Motion / parabola

What would happen to an individuals mass when moving

from planet A to planet B?

• The persons mass would not change. Mass is the amount of matter in an object.

Which car (red, green, or blue) experiences the greatest acceleration?

• The blue car has a greater acceleration. It is changing its velocity at a more drastic rate.

Which two spheres will have the greatest gravitational pull?

• A

Which color car represents graph B?

• The “Red” car is moving at a constant speed which is represented by graph B.

What must be eliminated for the following illustration to work on Earth?

• Air Resistance / Fluid Friction.

What has the sky diver reached when the force of gravity equals the force of air

resistance?

• Terminal Velocity

The following illustrations supports what law.

• Law of Conservation of Momentum

What is the action / reaction pair in the following illustration?

• (action)Baseball pushes glove to the left.• (reaction)Glove pushes baseball to the right.

In which direction would friction act on the following illustration?

• To the west, friction opposes motion.