angular and centripetal acceleration

An object is travelling at a constant speed of 10m/s around a circular path. The radius of the circle is 5m. What is its centripetal acceleration?

• 20 m/s^2

• 12 m/s^2

• 45 m/s^2

• 18 m/s^2

When a truck moves around in a circle with constant radius and speed, what is true?

• Acceleration is towards the centre
• Acceleration is zero
• Velocity is constant
• Acceleration is constant

Two balls are being swung on two strings of different length and they have different linear velocities. Ball A has a string of length r and a linear velocity of 3v. Ball B has a string of length 4r and a linear velocity of v. If T is the time period of ball A, what is the time period of ball B in terms of T?

• 4/3 T
• 3/4 T
• 12 T
• 1/12 T

Centripetal Acceleration is equal to

• (V^2)/r
• V/r
• V/r^2
• (V/r)^2

What does RPM stand for?

• Radians per minute
• vRooms Per minute
• Revolutions per minute
• Revolutions per meter

Where do objects moving in circles at a constant speed accelerate towards?

• Tangent to the circle
• Away from the center of the circle
• It does not accelerate
• The center of the circle

As this ride starts to spin in a circular motion the swings move outward.  What is the cause of this outward motion

• Gravity
• Centripetal Force
• Speed
• Inertia

Tags

NGSS.HS-PS2-1

A car is doing donuts in the parking lot with a circular velocity of 7.5 m/s in a radius of 5 m. What is the circular acceleration? (Write down your answer, you'll need it for the next problem!)

• 11.25 m/s²
• 37.5 m/s²
• 1.5 m/s²
• 3.333 m/s²

A dog sits 1.50 m from the center of a merry-go-round and revolves at a tangential speed of 1.80 m/s. If the dog’s mass is 18.5 kg, what is the magnitude of the centripetal force on the dog?

• 56 N
• 21 N
• 40 N
• 98 N

Tags

NGSS.HS-PS2-1

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

Tags

NGSS.HS-PS2-1