A 3000 pound vehicle is calculated to have a kinetic energy of 90,000 ft-lb at 28 mph. If the speed of the vehicle remains the same and the weight is doubled to 6000 pounds, what will happen to the calculated kinetic energy?
A) It will increase by the square (× 4), to 360,000 ft-lb
B) It will increase proportionally (× 2), to 180,000 ft-lb
C) It will remain the same
D) None of these is correct
B
You might also like to view...
PROBLEM 2.39 Two cylindrical rods, AC made of aluminum and CD made of steel, are joined at C and restrained by rigid supports at A and D. For the loading shown and knowing that Ea = 10.4 ? 106 psi and Es = 29 ? 106 psi, determine (a) the reactions at A and D, (b) the deflection of point C.
Typical movements at a hinge joint include
A) extension and gliding. B) rotation and inversion. C) gliding and pronation. D) flexion and rotation. E) extension and flexion.
Technician A says that a keyway cut into a shaft is a potential stress raiser. Technician B says that oil holes in crankshafts are potential stress raisers. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Rubber gloves can be damaged by _____.