STEM Exam I Questions & Answers 2023/2024

STEM Exam I Questions & Answers 2023/2024 When a space vehicle travels in a nearly circular orbit around Earth, is a force required to maintain is high speed? If the force of gravity were suddenly cut off, what type of path would the space vehicle follow? - ANSWER-The only force acting on the space vehicle is force of gravity. If the force of gravity was cut off, the vehicle would fly off in a straight line. If an object is moving, it continues to move without changing its speed, unless acted on by a non-zero force. Newton's Second Law of Motion - ANSWER-the acceleration produced by a net force on an object is directly proportional to the net force in the same direction and inversely proportional to the mass of the object What is the formula for acceleration? - ANSWER-A=F/m Newton (unit) - ANSWER-kg * m / s^2 A boxer can hit a heavy bag with a great force. Why can't he hit a sheet of newspaper in midair with the same amount of force? - ANSWER-A boxer can hit the heavy bag with great force but not the sheet of newspaper in midair with the same amount of force because the paper does not exert the same amount of reaction force. However, the heavy bag does have the same amount of reaction force as his punch. Newton's Third Law of Motion - ANSWER-Whenever an object exerts a force on a second object, the second object exerts an equal and opposite force on the first. Suppose that you are standing on a skateboard near a wall and you push on the wall with the force of 30 N. How hard does the wall push on you? - ANSWER-According to Newton's third law, the wall will push with the same force (30N) as you push the wall with. Can it be said that, when two vectors are at right angles to each other, the resultant Force is greater than either of the vectors separately? - ANSWER-Yes, the resulting net force is greater than two vectors that are right angles of each other.