The approximate height h of an object launched vertically upward after an elapsed time t is represented by the equation , where a is acceleration due to gravity, v0 is the object's initial velocity, and h0 is the object's initial height. The table above gives the acceleration due to gravityon Earth's moon and several planets. If two identical objects are launched verticallyupward at an initial velocity of 40 m/s from the surfaces of Mars and Earth's moon,approximately how many more seconds will it take for the moon projectile to returnto the ground than the Mars projectile?
A. 21
B. 28
C. 36
D. 50
Answer:B
The approximate height h of an object launched vertically upward after an elapsed time t is represented by the equation , where a is acceleration due to gravity, v0 is the object's initial velocity, and h0 is the object's initial height. The table above gives the acceleration due to gravityon Earth's moon and several planets. If two identical objects are launched verticallyupward at an initial velocity of 40 m/s from the surfaces of Mars and Earth's moon,approximately how many more seconds will it take for the moon projectile to returnto the ground than the Mars projectile?
A. 21 B. 28 C. 36 D. 50
Explanation: B