A SUV manufacturer puts out 2 models of SUV - both with the same
body shape (use the streamlined truck C_D of 0.55 if necessary) and
the same quality of wheels and bearings, but model B (for "Bigger")
is twice as big as model A - twice as wide, twice as tall, twice as
long, and 8 times as heavy. At the same speed, the force of
aerodynamic drag on model B will be:
B) 8 times larger than on model A
C) the same as on model A
D) 4 times smaller than on model A
E) 4 times larger than on model A
F) 8 times smaller than on model A
Keeping with the premise of the previous problem: At the same
speed, the rolling resistance force on model B is
approximately:
B) 4 times smaller than on model A
C) 8 times larger than on model A
D) the same as on model A
E) 4 times larger than on model A
F) 8 times smaller than on model A
Keeping with the premise of the previous 2 problems: At the
same speed and on a hill of the same grade, the
hill-climbing force on model B is:
A) 8 times smaller than on model A
B) 4 times smaller than on model A
C) 8 times larger than on model A
E) the same as on model A
F) 4 times larger than on model A
Keeping with the premise of the previous 3 problems: Going up
the same hill, the engine of model A provides
enough acceleration force to keep it moving at a constant velocity.
If the engine of model B provided the same
acceleration force, model B would be:
A) moving with a different constant velocity
B) decelerating
C) accelerating
E) coming to an immediate stop
F) moving with the same constant velocity