Forces & Newton's Laws

Which two of these forces act on parachutes?

• Air Resistance

• Gravity

• Thrust

• Kinetic Energy

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

NGSS.MS-PS2-4

Answer explanation

8N-3N = 5N to the right

Tags

NGSS.MS-PS2-2

(a)   is the force that opposes the sliding motion between two touching surfaces.

A force can act to cause an object at rest to move or it can accelerate an object that is already moving

• True

• False

Tags

NGSS.MS-PS2-2

What law is best described by inertia?

• 1st
• 2nd
• 3rd

Two forces are applied to a 2.0-kilogram block on a frictionless, horizontal surface, as shown in the diagram below. What is the acceleration of the block?

• 5.0 m/s² to the left

• 3.0 m/s² to the right

• 3.0 m/s² to the left

• 5.0 m/s² to the right

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A 50kg cart will accelerate at 4 m/s² when pushed with a force of 200N. This relationship demonstrates which of Newton's Laws of Motion?

• Newton's 1st Law of Motion

• Newton's 2nd Law of Motion

• Newton's 3rd Law of Motion

• Newton's 4th Law of Motion

A person not wearing a seatbelt flies through a car window when someone slams on the breaks because the person’s body wants to remain in continuous motion even when the car stops.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of them

An object will accelerate in some direction only if ___________________________________.

• a balanced force acts on it.

• an unbalanced force acts on it

• The object’s weight is increased

• The object has reached terminal velocity

Tags

NGSS.MS-PS2-2

For an object to be in equilibrium (balanced), the forces acting upon it must be

• in one direction, only.

• equal in magnitude and opposite in direction.

• both balanced and unbalanced.

• equal in magnitude and identical in direction