The following two questions concern the motion of a bullet fired straight down from the top of a high cliff. Consider only the motion once the bullet has left the barrel of the gun and before it hits the ground. Ignore air resistance.
The acceleration of the bullet will be
1. equal to 0.
2. more than 9.8 m/s2
3. first greater than 9.8 m/s2
, then less.
4. equal to 9.8 m/s2 (this is the correct answer
5. less than 9.8 m/s2
6. first less than 9.8 m/s2
, then greater.
The speed of the bullet will be? 1. equal to 9.8 m/s.
2. first slower than its initial speed, then faster.
3. always less than its initial speed.
4. equal to its initial speed.
5. first faster than its initial speed, then slower.
6. always greater than or equal to its initial speed.
7. equal to 9.8 m/s2
8. equal to zero.