Torque - Page 24
Questions
- A space shuttle 340 miles above the earth is orbiting the earth once every 11 hours. How far does the shuttle travel in 3 hours? (Assume the radius of the earth is 4,000 miles.)
- The rate of rotation of a solid disk with a radius of #3 m# and mass of #4 kg# constantly changes from #2 Hz# to #5 Hz# over #8 s#. What torque would was applied to the disk at #2 s#?
- What is the kinetic energy of a 150kg object that is moving with a speed of 15 m/sec?
- If the torque needed to loosen a bolt is 40.0 Nm, what must be the minimum force exerted on a .30 m wrench to loosen the bolt?
- A remote-control car has a mass of #1.5# #kg#. Its electric motor accelerates the car at #6# #m##/##s^2#. What force does the motor provide?
- How does a 'cheater bar' added to the end of a wrench, create more torque?
- A .580kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. The velocity of the rock is 4.50 m/s. What the centripetal force acting on the rock?
- What quantity describes the ability of a force to rotate an object? How does it differ from a force? On what quantities does it depend?
- Please explain ? Question 21.
- If wheem is turning at 3.0rad/s,the time it takes to compelete one revolution? a) 0.33s b)0.67s d)2.1s
- When is the net torque about a point 0?
- 2 forces each of magnitude 8N act at point in the direction of OA and OB the angle between the forces is theta resultant of two force has component 9N in the direction OA find value of theta?
- A gear of radius 4 inches turns at 8 rpm. What is the linear velocity of a tooth of the gear in feet per minute to the nearest tenth?
- A heavy bank vault door is opened by the application of #3.0*10^2# #N# directed perpendicular to the plane of the door at a distance of #0.80# #m# from the hinges. What is the torque?
- The rate of rotation of a solid disk with a radius of #12 m# and mass of #5 kg# constantly changes from #4 Hz# to #6 Hz#. If the change in rotational frequency occurs over #4 s#, what torque was applied to the disk?
- If #hata_1,hata_2andhata_3 #are unit vectors and#2hata_1+2hata_2+hata_3=0# then angle between #hata_1 and hata_2 # is?