Centripetal Force And Acceleration - 2 Question Preview (ID: 49747)
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Which of the following terms means center seeking?
a) centrifugal
b) centrifuge
c) centripetal
d) centenarian
A test car moves at a constant speed around a circular track. If the car is 48.2 m from the track's center and has a centripetal acceleration of 8.05 m/s2, what is the car's velocity?
a) 19.7 m/s
b) 0.17 m/s
c) 5.99 m/s
d) 388.01 m/s
Which of the following is the unit for centripetal force?
a) N
b) J
c) m/s^2
d) kg⋅m/s
A dolphin swims in a circle with a radius of 30 m and moves with a velocity of 3.2 m/s. What is the dolphin’s centripetal acceleration?
a) 0.341 m/s^2
b) 96 m/s^2
c) 0.106 m/s^2
d) 307.2 m/s^2
A Hot Wheels toy car races around a circular track that has a radius of 1.2 meters. It moves around the track with a tangential velocity of 1.8 m/s. What is the toy’s centripetal acceleration?
a) 2.7 m/s^2
b) 1.5 m/s^2
c) 2.16 m/s^2
d) 3.89 m/s^2
A marble with a mass of 0.1 kg spins in a circle that is 0.5 meters from its center. It has a speed of 1.4 meters per second. What is the marble’s centripetal force when it hits another marble?
a) 0.392 N
b) 3.92 N
c) 1.96 N
d) 39.2 N
An ice skater with a mass of 75 kg skates in a circle that has a radius of 22.3 meters. The ice skater takes 9.17 seconds to complete a lap. What is the ice skater’s centripetal force?
a) 19.890 N
b) 0.265 N
c) 5.914 N
d) 182.388 N
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.
a) 2.4 m/s
b) 3.6 m/s
c) 4.2 m/s
d) 3.9 m/s
The velocity is always _____ to the line of a circle.
a) tangent
b) outwards
c) towards the center
d) faster
Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
a) 0.25 ms-2
b) 1 ms-2
c) 0.5 ms-2
d) 2 ms-2
What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?
a) 17.63 m/s2
b) 8.81 m/s2
c) 5 m/s2
d) 10 m/s2
Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.
a) 40 N
b) 20 N
c) 10 N
d) 30 N
What object experiences uniform circular motion?
a) A car traveling around a roundabout at a constant speed
b) A car speeding up as it turns left
c) A car slowing down as it crests a tall hill
d) A car traveling down the road at a constant speed
What is the force that causes centripetal acceleration when a car goes around a curve?
a) friction
b) gravity
c) normal
d) tension
Centrifugal force is a ______
a) fictitious force that is really just the linear momentum of an object in uniform circular motion.
b) force that pushes you to the outside of a circle during uniform circular motion.
c) The force that keeps the planets in orbit
d)
A bicycle has a speed of 30 m/s . What is the centripetal acceleration of its tires if the radius is 3 m?
a) 60 m/s
b) 600 m/s
c) 300 m/s
d) 30 m/s
A rope attaches a tire to an overhanging tree limb. A girl swinging on the tire has a centripetal acceleration of 3.0 m/s2. If the length of the rope is 2.1 m, what is the girl’s velocity?
a) 2.5 m/s
b) 3.5 m/s
c) 12.5 m/s
d) 8.5 m/s
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