- (A) equal to 45 deg
- (B) equal to 90 deg
- (C) equal to each other
- (D) none of the above
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- (A) 1 N
- (B) 10 N
- (C) 100 N
- (D) none
- (A) straight line
- (B) parabola
- (C) hyperbola
- (D) circle
- (A) at2/2
- (B) Vt
- (C) a2t/2
- (D) at2
- (A) 5m/s, 1m/s
- (B) 3m/s, 3m/s
- (C) 6m/s, 1m/s
- (D) 4m/s, 2m/s
- (A) Constant
- (B) not constant
- (C) constant if the rate of ejected gases is constant
- (D) constant for short range rocket.
- (A) a gas filled ballon
- (B) bullet fired from gun
- (C) a football kicked
- (D) a base ball shot
- (A) -1
- (B) 1
- (C) 2
- (D) -2
- (A) momentum changes but K.E remain conserve
- (B) K.E changes but momentum remain conserve
- (C) both momentum and K.E changes
- (D) both momentum and K.E remain conserve
- (A) constructive interference
- (B) destructive interference
- (C) beats
- (D) resonance
