Concept Torque & Simple Machines Individual

When on a bike going uphill, what happens to the speed and torque?

• Speed decreases; torques increases
• Speed decreases; torques decreases
• Speed increases; torques decreases
• Speed increases; torques increases

On a Ferris wheel, what happens to the speed and torque from the control panel motor to the gear attached to the ferris wheel is turned on to rotate?

• Speed decreases; torques increases

• Speed decreases; torques decreases

• Speed increases; torques decreases

• Speed increases; torques increases

When on a bike going downhill, what happens to the speed and torque?

• Speed decreases; torques increases
• Speed decreases; torques decreases
• Speed increases; torques decreases
• Speed increases; torques increases

If the small gear is driving the large gear, what is happening to the torque on the large gear?

• Increase
• Decrease
• Remains constant
• Not enough information

What axis must intersect to find the center of mass?

• X & Y
• X & Y & Z
• Y & Z
• none of the above

Find the magnitude of the torque formula if produced by a 22.0 N force applied to a door at a 30 degree from the perpendicular distance of .005 km from the hinge.

• T=Frsin𝞡

• T=Frcos𝞡

• Tnet=0

• T/r=F

If the torque required to loosen a nut on the wheel of a car has a magnitude of 60.0 N• m, what minimum perpendicular force formula must be exerted by a mechanic at the end of a 45.0 cm wrench to loosen the nut?

• T/F=r

• T/r=F

• T=Fr

• Tnet=0

A state of equilibrium is also seen below. Each of the cars weighs the same 9800 N. Despite the fact that there is only one car on the left-hand side that is 9 m from the fulcrum, the moments balance because, the car on the left-hand side, is ____meters from the fulcrum, compared to the cars on the right-hand side. Set up the Tnet formula for this situation:

• Tnet= +T1 -T2=0

• Tnet= -T1 -T2=0

• Tnet= -T1 +T2=0

• Tnet= +T1 -T2=1

When speed increases, what happens to the value of motor load torque?

• increases
• decreases
• stays constant

Where does the center of mass need to be ____ compared to the support area?

• above
• below
• same height
• none of the above