Question 1: A cannon fires a projectile into the air at an angle of 60o above the horizontal. The projectile falls back on the ground at a distance d from the cannon and its maximum height is h. Ratio d/h is equal to: 4.75 5.54 3.33 2.31 2 Question 2: A football is tossed up into the air in the +y direction. Which of the following is true at the point where the football reaches the ground? the velocity of the ball is negative and the acceleration is negative the velocity of the ball is negative and the acceleration is positive the velocity of the ball is positive and the acceleration is negative the velocity of the ball is positive and the acceleration is positive the velocity of the ball is zero and the acceleration is negative Question 3: The graph above shows the velocity v of an object moving along the x axis, function of time. Which graph below is a possible acceleration versus time for this object? a b c d e Question 4: Two masses are connected by a cord and hung from a frictionless pulley as shown below. What is the relationship between the masses M and m, if M > m and the acceleration of the two masses is g/2? M = m M = 2m M = 3m M = 4m M = 5m Question 5: An 1kg object moves along the x-axis according to the function x(t) = mt3 + nt2 + pt + q, where m,n,p and q are real numbers. If the magnitude of the net force acting at t1 = 1s is 4 Newtons and at t2 = 2s is 10 Newtons, what is the magnitude of the force at t3 = 3s? 10N 12N 13N 14N 16N Question 6: A mass of 20kg is suspended from a cable C and a rigid horizontal bar B as shown below. What is the tension in cable C? 200N 282N 300N 312N 333N Question 7: A force F acting on an object is given by the expression F(s) = (7s3/4 + 5) Newtons, where s is the position of the object in meters. What is the work done by the force F between s = 0m and s = 1m? 6 Joules 9 Joules 10 Joules 12 Joules 17 Joules Question 8: A spring of negligible mass and spring constant k is fastened on one end to a wall and attached at the other end to a block of mass m. The block is pulled back a distance d from the equilibrium position and released. At what distance from the equilibrium position is the kinetic energy of the block equal to the elastic potential energy? d d/1.2 d/1.333 d/1.414 d/1.5 Press the Submit button to see the results.