SPH3U: Physics, Grade 11, University Preparation PART A: MULTIPLE CHOICE (10 MARKS) (C) Choose the best response in each case and circle your answer. 1. A force of 1.0 N is equivalent to: (a) 1.0 kg/s (b) 1.0 kg.m/s (c) 1.0 kg.m'/s (d) 1.0 kg.m/s' 2. Force is defined as: (a) mass x velocity (b) pressure/ area (c) mass/ volume (d) mass x acceleration 3. A child stomps his feet to remove snow from his boots. This fact illustrates Newton's: (a) first law (b) second law (c) third law (d) law of gravitation 4. An object, moving at constant velocity, must: (a) have a net force acting on it (b) eventually stop due to the force of gravity (c) have all forces acting on it balance each other (d) not have a force of gravity acting on it 5. Acceleration is always in the direction of the: (a) net force (b) initial velocity (c) final velocity (d) displacement 6. The following forces act on object: 13.5 N [W], 21.2 N [E], 33.0 N [E], and 25.3 N [W]. Calculate the net force acting on the object. (a) 15.4 N [W] (b) 15.4 N [E] (c) 23.6 N [W] (d) 23.6 N [E] 7. What is the missing force in the following diagram? 10 N (a) 10 N (b) 30N 20 N (c) 50 N (d) 70 N 8. A net force of 58.0 N [W] is applied to a ball of mass 4.50 x 10 g. Calculate the ball's acceleration. (a) 0.129 m/s' [W] (b) 0.13 m/s' [W] (c) 129 m/s' [W] (d) 130 m/s' [W]