C165 - Unit 2 Physics - Lessons 1-7:
Quiz Exam Questions and Answers
100% PASS
A CARGO SPACECRAFT THAT BRINGS SUPPLIES TO THE
INTERNATIONAL SPACE STATION (ISS) IS LAUNCHED USING
ROCKET PROPULSION. THE SPACECRAFT'S ROCKETS FIRE HOT
GASES BACKWARD. WHICH STATEMENT IS TRUE ABOUT THIS
SITUATION ACCORDING TO NEWTON'S THIRD LAW?
THE FORCE THAT THE ROCKET EXERTS ON THE HOT GASES IS
EQUAL AND OPPOSITE TO THE FORCE THE HOT GASES EXERT ON
THE ROCKET. THEREFORE, THE TWO FORCES CANCEL, AND THE
ROCKET DOES NOT ACCELERATE.
THE ROCKET WILL ACCELERATE FORWARD BECAUSE THE GASES
PUSH IT OFF THE GROUND.
,WHEN THE ROCKETS FIRE HOT GASES BACKWARD, THIS CREATES
HUGE FORCES IN THE OPPOSITE DIRECTION, EXERTED ON THE
SPACECRAFT BY THE HOT GASES. - CORRECT ANSWER-WHEN THE
ROCKETS FIRE HOT GASES BACKWARD, THIS CREATES HUGE
FORCES IN THE OPPOSITE DIRECTION, EXERTED ON THE
SPACECRAFT BY THE HOT GASES.
EXPLANATION:
THE HOT GASES CREATE A REACTION FORCE ON THE SPACECRAFT
IN THE OPPOSITE DIRECTION.
A PARACHUTE IS DEPLOYED TO SLOW DOWN A SKYDIVER WHILE
DESCENDING TOWARD THE GROUND. WHAT HAPPENS WHILE HE
IS DESCENDING?
HIS VELOCITY POINTS UPWARD, AND HIS ACCELERATION POINTS
UPWARD.
HIS VELOCITY POINTS DOWNWARD, AND HIS ACCELERATION
POINTS DOWNWARD.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law
, HIS VELOCITY POINTS DOWNWARD, AND HIS ACCELERATION
POINTS UPWARD.
HIS VELOCITY POINTS UPWARD, AND HIS ACCELERATION POINTS
DOWNWARD. - CORRECT ANSWER-HIS VELOCITY POINTS
DOWNWARD, AND HIS ACCELERATION POINTS UPWARD.
EXPLANATION:
VELOCITY ALWAYS POINTS IN THE DIRECTION OF MOTION AND
ACCELERATION IN THE DIRECTION OF THE CHANGING VELOCITY,
WHICH IN THIS CASE MEANS UPWARD.
AS A CARGO SPACECRAFT LIFTS OFF, ITS BOOSTER ROCKETS ARE
EMPLOYED TO ACCELERATE IT. ASSUME THAT THE BOOSTER
ROCKETS APPLY A CONSTANT FORCE ON THE SPACECRAFT. THE
HIGHER THE SPACECRAFT ASCENDS, THE LESS MASS IT HAS
BECAUSE SOME OF ITS FUEL IS BURNED. WHAT IS HAPPENING AS
THE SPACECRAFT IS ASCENDING?
BOTH ITS SPEED AND ACCELERATION INCREASE.
Quiz Exam Questions and Answers
100% PASS
A CARGO SPACECRAFT THAT BRINGS SUPPLIES TO THE
INTERNATIONAL SPACE STATION (ISS) IS LAUNCHED USING
ROCKET PROPULSION. THE SPACECRAFT'S ROCKETS FIRE HOT
GASES BACKWARD. WHICH STATEMENT IS TRUE ABOUT THIS
SITUATION ACCORDING TO NEWTON'S THIRD LAW?
THE FORCE THAT THE ROCKET EXERTS ON THE HOT GASES IS
EQUAL AND OPPOSITE TO THE FORCE THE HOT GASES EXERT ON
THE ROCKET. THEREFORE, THE TWO FORCES CANCEL, AND THE
ROCKET DOES NOT ACCELERATE.
THE ROCKET WILL ACCELERATE FORWARD BECAUSE THE GASES
PUSH IT OFF THE GROUND.
,WHEN THE ROCKETS FIRE HOT GASES BACKWARD, THIS CREATES
HUGE FORCES IN THE OPPOSITE DIRECTION, EXERTED ON THE
SPACECRAFT BY THE HOT GASES. - CORRECT ANSWER-WHEN THE
ROCKETS FIRE HOT GASES BACKWARD, THIS CREATES HUGE
FORCES IN THE OPPOSITE DIRECTION, EXERTED ON THE
SPACECRAFT BY THE HOT GASES.
EXPLANATION:
THE HOT GASES CREATE A REACTION FORCE ON THE SPACECRAFT
IN THE OPPOSITE DIRECTION.
A PARACHUTE IS DEPLOYED TO SLOW DOWN A SKYDIVER WHILE
DESCENDING TOWARD THE GROUND. WHAT HAPPENS WHILE HE
IS DESCENDING?
HIS VELOCITY POINTS UPWARD, AND HIS ACCELERATION POINTS
UPWARD.
HIS VELOCITY POINTS DOWNWARD, AND HIS ACCELERATION
POINTS DOWNWARD.
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law
, HIS VELOCITY POINTS DOWNWARD, AND HIS ACCELERATION
POINTS UPWARD.
HIS VELOCITY POINTS UPWARD, AND HIS ACCELERATION POINTS
DOWNWARD. - CORRECT ANSWER-HIS VELOCITY POINTS
DOWNWARD, AND HIS ACCELERATION POINTS UPWARD.
EXPLANATION:
VELOCITY ALWAYS POINTS IN THE DIRECTION OF MOTION AND
ACCELERATION IN THE DIRECTION OF THE CHANGING VELOCITY,
WHICH IN THIS CASE MEANS UPWARD.
AS A CARGO SPACECRAFT LIFTS OFF, ITS BOOSTER ROCKETS ARE
EMPLOYED TO ACCELERATE IT. ASSUME THAT THE BOOSTER
ROCKETS APPLY A CONSTANT FORCE ON THE SPACECRAFT. THE
HIGHER THE SPACECRAFT ASCENDS, THE LESS MASS IT HAS
BECAUSE SOME OF ITS FUEL IS BURNED. WHAT IS HAPPENING AS
THE SPACECRAFT IS ASCENDING?
BOTH ITS SPEED AND ACCELERATION INCREASE.
