If the net force applied to an object is zero, the net torque:
a. must also be zero.
b. can never be zero.
c. can sometimes be zero.
d. is not related to the net force.
e. can only be clockwise.
c
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What current must be maintained in a square loop (50 cm on a side) to create a torque of 1.0 N ? m about an axis through its center and parallel to one of its sides when a magnetic field of magnitude 70 mT is directed at 40° to the plane of the loop?
A. 66 A B. 89 A C. 61 A D. 75 A E. 37 A
Find the pressure in atmospheres in the water at the base of Dworshak Dam if the water in the reservoir is 200 meters deep. (1.01 × 10^5 N/m2 = 1 ATM.)
a. 20.4 ATM b. 24.7 ATM c. 29.4 ATM d. 194 ATM e. 75 ATM
Kinetic energy refers to the energy of a(n)____
a. stationary body b. moving body c. moon d. gravitational field e. object due to its position
A certain aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is a constant 445,000 N, what is the speed of the airplane 10.0 s later?
A) 10.0 m/s B) 12.2 m/s C) 14.0 m/s D) 18.0 m/s E) 20.0 m/s