CHAPTER 6. MOTIONIN TWO DIMENSIONS 6.5
Which one of the following statements is true with reference to the
acceleration of the bullet during its motion, if airresistance is ignored?
The acceleration:
(a) is always downwards
(b) is first upwards andthen downwards
(c) is first downwards and then upwards
(d) decreases first and then increases
- [SC 2002/03 HG1] Thabo suspends a bag oftomatoes from a spring
balance held vertically.The balance itself weighs 10 N and he notes
that the balance reads 50 N. He then lets go ofthe balance and the
balance and tomatoes fall freely. What would the reading be on the
balance while falling?
falls freely
(a) 50 N
(b) 40 N
(c) 10 N
(d) 0 N
- [IEB 2002/11 HG1]Two balls, P and Q, aresimultaneously thrown
into the air from the same height above the ground. P is thrown
vertically upwards and Qvertically downwards with the same initial
speed. Which of the following is true of bothballs just before they
hit the ground? (Ignoreany air resistance. Takedownwards as the
positive direction.)
Velocity Acceleration
A The same The same
B P has a greater velocity than
Q
P has a negative accelera-
tion; Q has a positive accel-
eration
C P has a greater velocity than
Q
The same
D The same P has a negative accelera-
tion; Q has a positive accel-
eration
