During the push and while the students are still touching one another: (A) neith
ID: 1621451 • Letter: D
Question
During the push and while the students are still touching one another: (A) neither students exerts a force on the other. (B) student "a" exerts a force on student "b", but "b" does not exert any force on "a". (C) each student exerts a force on the other, but "b" exerts the larger force. (D) each student exerts a force on the other, but "a" exerts the larger force. (E) each student exerts the same amount of force on the other. An empty office chair is at rest on a floor, Consider the following forces: 1. A downward force of gravity. 2. An upward force exerted by the floor. 3. A net downward force exerted by the air. Which of the forces is (are) acting on the office chair? (A) 1 only. (B) 1 and 2. (C) 2 and 3. (D) 1, 2, and 3 (E) none of the forces. (Since the chair is at rest there are no forces acting upon it.) Despite a very strong wind, a tennis player manages to hit a tennis ball with her racquet so that the ball passes over the net and lands in her opponent's court, Consider the following forces: 1. A downward force of gravity. 2. A force by the "hit". 3. A force exerted by the air. Which of the above forces is (are) acting on the tennis ball after it has left contact with the racquet and before it touches the ground? (A) 1 only. (B) 1 and 2. (C) 1 and 3. (D) 2 and 3. (E) 1, 2, and 3.Explanation / Answer
28) E
Since by Newton's third law of motion, every action has an equal and opposite reaction.
29) B
These two forces balance each other and hence the chair is at rest.
30) C
The force of hit exists only till the racket is in contact with the ball, i.e during the hit and not after the contact is lost.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.