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Centripetal Force And Acceleration - 2
Test Description: Force
Instructions: Answer all questions to get your test result.
1) Which of the following terms means center seeking?
A
centrifugal
B
centrifuge
C
centenarian
D
centripetal
2) 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
5.99 m/s
B
388.01 m/s
C
19.7 m/s
D
0.17 m/s
3) Which of the following is the unit for centripetal force?
A
J
B
N
C
m/s^2
D
kg⋅m/s
4) 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
307.2 m/s^2
B
0.106 m/s^2
C
96 m/s^2
D
0.341 m/s^2
5) 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
1.5 m/s^2
B
3.89 m/s^2
C
2.7 m/s^2
D
2.16 m/s^2
6) 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
39.2 N
B
3.92 N
C
1.96 N
D
0.392 N
7) 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
182.388 N
C
0.265 N
D
5.914 N
8) 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
3.9 m/s
C
3.6 m/s
D
4.2 m/s
9) The velocity is always _____ to the line of a circle.
A
tangent
B
towards the center
C
faster
D
outwards
10) Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
A
2 ms-2
B
0.25 ms-2
C
1 ms-2
D
0.5 ms-2
11) What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?
A
10 m/s2
B
17.63 m/s2
C
8.81 m/s2
D
5 m/s2
12) 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
10 N
B
40 N
C
20 N
D
30 N
13) What object experiences uniform circular motion?
A
A car speeding up as it turns left
B
A car slowing down as it crests a tall hill
C
A car traveling around a roundabout at a constant speed
D
A car traveling down the road at a constant speed
14) What is the force that causes centripetal acceleration when a car goes around a curve?
A
friction
B
tension
C
normal
D
gravity
15) 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
16) A bicycle has a speed of 30 m/s . What is the centripetal acceleration of its tires if the radius is 3 m?
A
300 m/s
B
600 m/s
C
30 m/s
D
60 m/s
17) 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
8.5 m/s
B
3.5 m/s
C
12.5 m/s
D
2.5 m/s
*select an answer for all questions
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