In: Physics
A child wants to pump up a bicycle tire so that its pressure is 1.2 × 105 Pa above that of atmospheric pressure. If the child uses a pump with a circular piston 0.035 m in diameter, what force must the child exert?
Select one:
A. 120 N
B. 89 N
C. 76 N
D. 54 N
E. 240 N