Forces and vectors Review

A skydiver jumps from an airplane and deploys their parachute...after falling for a few seconds, the free-body diagram shows the forces acting upon them. How would you describe the motion of this skydiver?

• The skydiver glides downward with constant velocity

• The skydiver slows down as the parachute creates air resistance

• The skydiver accelerates towards the surface of the earth

• The skydiver is at rest

Also called "weight".

• friction force

• gravitational force

• normal force

• tension force

Two forces, 25 N and 35 N, act concurrently on an object. As the angle between the two vectors is increased from 0⁰ to 180⁰, the resultant changes from

• 0 N to 60 N

• 10 N to 35 N

• 60 N to 10 N

• 35 N to 10 N

Tags

NGSS.HS-PS2-1

Name the missing force...

• applied force
• weight force
• lift
• normal force

Tags

NGSS.HS-PS2-1

Which of the following quantities are vectors?

• speed, velocity, acceleration
• velocity, acceleration, force
• force, acceleration, mass
• length, mass, time

Tags

CCSS.HSN.VM.A.1

Which one has the LEAST inertia?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

If an object is spinning around on a string and the string was suddenly cut, the object would continue to move in a

• circular path

• straight line (tangential to circle)

• stop suddenly

• curved path opposite the direction of spin

A curved groove is place on the top of a level table as shown in the diagram. A ball is pushed in the groove at P so that it leaves at Q. Which picture shows how the ball will move when it leaves the groove at Q?

• 
• 
• 
• 

The equilibrium rule, ∑F = 0, applies to...

• objects or systems at rest.

• objects or systems in uniform motion in a straight line.

• neither (a) nor (b)

• both (a) and (b)

Tags

NGSS.HS-PS2-2

An object of mass m is hanging by a string from the ceiling of an elevator. The elevator is moving up at constant speed. What is the tension in the string?

• Less than mg

• Exactly mg

• Greater than mg

• Cannot be determined without knowing the speed