Force and Motion CFA

What does the equation F=ma represent?

• The force of gravity on an object

• The relationship between velocity and acceleration

• Newton's First Law of Motion

• The relationship between force, mass, and acceleration

Tags

NGSS.HS-PS2-1

If the mass of an object remains constant, what happens to its acceleration when you increase the applied force?

• Acceleration increases

• Acceleration decreases

• Acceleration remains the same

• Mass decreases

Tags

NGSS.MS-PS2-2

A 10 kg object experiences a net force of 20 N. What is its acceleration?

• 2 m/s²

• 10 m/s²

• 20 m/s²

• 200 m/s²

Tags

NGSS.MS-PS2-2

An object is subjected to a net force of 100 N and accelerates at 5 m/s². What is the mass of the object?

• 5 kg

• 15 kg

• 20 kg

• 500 kg

Tags

NGSS.MS-PS2-2

What is true about a 5 kg object and and 50 kg object?

• The 5 kg object will take more force to accelerate.

• The 5 kg object will always be faster.

• 50 kg is less mass than 5 kg.

• The 50 kg object will take more force to accelerate.

Tags

NGSS.MS-PS2-2

Which of the following statements best describes an unbalanced force?

• Forces that cause an object to remain at rest.

• Forces that cause an object to move with constant velocity.

• Forces that cause an object to accelerate.

• Forces that don't affect motion.

Tags

NGSS.HS-PS2-1

According to Newton's First Law of Motion, an object will continue to stay at rest or move at a constant velocity unless:

• It is acted upon by an unbalanced force.

• It has a large mass.

• It is in outer space.

• It is on a flat surface.

Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its:

• Mass

• Speed

• Volume

• Temperature

Tags

NGSS.MS-PS2-2

According to Newton's Third Law of Motion, for every action, there is an equal and opposite:

• Reaction

• Force

• Acceleration

• Friction

Tags

NGSS.MS-PS2-1

When an object is in has a parachute and is falling towards the earth, what is true air resistance?

• Air resistance has no effect on the object's motion.

• Air resistance always causes the object to fall faster.

• Air resistance always causes the object to fall slower.

• The effect of air resistance depends on the size and shape of the object.