Unit 6- Circular Motion Quiz

Which represents the acceleration of the ball?

• A
• B
• C
• D

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

• 2.4 m/s
• 3.6 m/s
• 3.9 m/s
• 4.2 m/s

Calculate the mass of an object if it took 20 N to rotate it in a circle with a radius of 2 meters with a velocity of 4 m/s

• 4.1 kg
• 3.6 kg
• 2.5 kg
• 1.8 kg

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

• 10 N
• 20 N
• 30 N
• 40  N

Two object each have masses of 9,000,000 kg and are 1 meter apart from each other. What's the force of gravity between them?

• 5402 N

• 6320 N

• 7541 N

• 7945 N

Two objects each have masses of 4500 kg and are .03 meters apart from each other. What's their force of gravity?

• .3 N

• .7 N

• 1.1 N

• 1.5 N

When an object experiences uniform circular motion, the direction of the net force is      A) in the same direction as the motion of the object.  
B) in the opposite direction of the motion of the object.  
C) is directed toward the center of the circular path.   D) is directed away from the center of the circular path. 

• A
• B
• C
• D

When an object experiences uniform circular motion, the direction of the acceleration is     
A) in the same direction as the velocity vector.  
B) in the opposite direction of the velocity vector.  
C) is directed toward the center of the circular path.   D) is directed away from the center of the circular path. 

• A
• B
• C
• D

An object moves in a circular path at a constant speed.  Compare the direction of the object's velocity and acceleration vectors.    
A) Both vectors point in the same direction.  
B) The vectors point in opposite directions.  
C) The vectors are perpendicular.  
D) The question is meaningless, since the acceleration is zero

• A
• B
• C
• D

Is it possible for an object moving with a constant speed to accelerate?  Explain. 
A) No, if the speed is constant then the acceleration is equal to zero.  B) No, an object can accelerate only if there is a net force acting on it.  
C) Yes, although the speed is constant, the direction of the velocity can be changing.  
D) Yes, if an object is moving it can experience acceleration 

• A
• B
• C
• D