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WorksheetsUnit 7 - Quiz #3
Total questions: 10
Worksheet time: 18mins
Matthew (68 kg) rode the Rock 'n' Roller Coaster at Disney! During the loop, the coaster reached ω=2.8 rad/s. What centripetal force does Matthew experience if he is seated 17.2 m from the center of the loop?
3300 N
9200 N
4600 N
7200 N
Trying to be cool like Mrs. Musson, Jordan spun his keys (1.2 kg) around on his lanyard (length 0.32 m). Calculate ω of the keys if the tension on the lanyard is 22.8 N.
19 rad/s
59.4 rad/s
4.23 rad/s
7.7 rad/s
Angular acceleration results from:
constant angular speed
inertia
net force = 0
net force not = 0
Find the magnitude of the torque produced by a 22.0 N force applied to a door at a 30 degree angle from the perpendicular distance of 0.75 m from the hinge.
8.3 Nm
16.5 Nm
14.2 Nm
4.8 Nm
A 800 N man is playing on a seesaw with son who has a weight of 200 N. If the child is sitting 3 meters from the fulcrum, how far will the man have to sit to balance the seesaw?
1 m
3 m
1.5 m
0.75 m
A horse gallops around a circular arena. The centripetal force on the horse is ___.
directed outward from the center of the arena
tension
directed toward the center of the arena
9.81 N
At what distance must a 50 N force be applied to generate a torque of 10 Nm on the bolt?
5 m
2 m
0.2 m
0.5 m
Jack likes to balance meter sticks on his finger. He adds a mass of 75 N at the 1 cm mark and a 25 N mass at the 34 cm mark. Finally, he had Jacob push down at the 92 cm mark to bring the stick into equilibrium. If the meter stick weighs 2.5 kg, what force must Jacob apply?
97 N
117 N
87.5 N
56.8 N
