Motor and Torque

Find the magnitude of the torque produced by a 3.0 N force applied to a door at a perpendicular distance of 25 cm from the hinge.

• 75 Nm
• .75 Nm
• 6.3 Nm
• 8.75 Nm

Find the magnitude of the torque produced by a 18.0 N force applied to a door at a 60 degree from the perpendicular distance of  .001 km from the hinge.

• 15.6 Nm
• .015 Nm
• 6.3 Nm
• 8.75 Nm

If the torque required to loosen a nut on the wheel of a car has a magnitude of 40.0 N• m, what minimum perpendicular force must be exerted by a mechanic at the end of a 60.0 cm wrench to loosen the nut?

• .666 Nm
•  133.3 N
• 66.7 N
• 13.3 Nm

If the torque required to loosen a nut on the wheel of a car has a magnitude of 90.0 N• m, what minimum 45 degrees from the perpendicular force must be exerted by a mechanic at the end of a 55.0 cm wrench to loosen the nut?

• 231.4 N
• 2.314 N
• 35 N
• 3500 N

A state of equilibrium is also seen below. Each of the cars weighs the same (1 Tonne= 4470000 N). Despite the fact that there is only one car on the left-hand side that is 6 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.

• 4 m
• 3 m
• 1 m
• 2 m

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

• increases
• decreases
• stays constant

When speed decreases, what happens to the value of torque?

• increases
• decreases
• stays constant

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

Tags

NGSS.HS-PS2-1

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

• 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