Homework 04 - homework 04 GADHIA, TEJAS Due: Feb 14 2007,...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
homework 04 – GADHIA, TEJAS – Due: Feb 14 2007, 4:00 am 1 Question 1 part 1 of 1 10 points 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 opponents 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? 1. 1 and 2 2. 2 and 3 3. 1 and 3 4. 1 only 5. 1, 2 and 3 Question 2 part 1 of 1 10 points An elevator is being lifted up an el- evator shaft at a constant speed by a steel cable as shown in the ±gure be- low. All frictional e²ects are negligible. steel cable Elevator going up at constant speed In this situation, forces on the elevator are such that 1. the upward force by the cable is greater than the sum of the downward force of gravity and a downward force due to the air. 2. the upward force by the cable is equal to the downward force of gravity. 3. the upward force by the cable is greater than the downward force of gravity. 4. None of these. (The elevator goes up because the cable is being shortened, not be- cause an upward force is exerted on the eleva- tor by the cable.) 5. the upward force by the cable is smaller than the downward force of gravity. Question 3 part 1 of 1 10 points A 1 ton truck provides an acceleration of 4 . 6 ft / s 2 to a 8 ton trailer. If the truck exerts the same force on the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/05/2010 for the course BIO 52435 taught by Professor Clerck during the Spring '10 term at University of Texas at Austin.

Page1 / 4

Homework 04 - homework 04 GADHIA, TEJAS Due: Feb 14 2007,...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online