1) Based on the diagram. Determine the direction of the acceleration acting on the box. a) To the left  b) Upward c) To the right  d) Downward 2) If the 50 kg crate starts from rest and achieves a velocity of v=4 m/s when it travels a distance of 5 m to the right, determine the magnitude of force P acting on the crate. The coefficient of the kinetic friction between the crate and the ground is μk= 0.3. a) P = 220 N b) P = 224 N  c) P = 490.5 N  d) P = 394.5 N 3) A 10kg block with an initial velocity of 10m/s slides 10m across a horizontal surface and comes to rest. It takes the block 2 seconds to stop. The stopping force acting on the block is about: a) F = 5 N b) F = 10 N c) F = 25 N  d) F = 50 N  4) For any object, the greater the force that’s applied to it, the greater its ________________ will be. a) Gravity b) Acceleration c) Velocity  d) Inertia  5) Choose the right situation where the Newton’s Second Law (F=ma) concept can be applied? a) A ball rolling on the floor and eventually stopping without being touched. b) A person pushing a shopping cart, and the cart speeds up. c) A book resting on a table without moving. d) A boy jumping off a diving board and falling straight down. 6) Which of the following best describes Newton's Second Law of Motion? a) For every action, there is an equal and opposite reaction. b) Objects at rest stay at rest unless acted upon by a force. c) The acceleration of an object is directly proportional to the net force and inversely proportional to its mass. d) Energy cannot be created or destroyed. 7) A box with a mass of 10 kg is pulled on a smooth horizontal surface with a force of 50 N. What is the acceleration of the box? a) 2.0 m/s2 b) 2.5 m/s2 c) 10.0 m/s2 d) 5.0 m/s2 8) A 12 kg sled is being pulled across a snowy surface with a net force of 18N. What is the sled’s acceleration? a) 0.67 m/s2 b) 1.5 m/s2 c) 2.0 m/s2 d) 6.0 m/s2 9) A 500 kg car is driven down on a 15o inclined plane at a speed of 30 m/s. Then, the brakes are applied causing a total braking force of 4 000 N. What is the distance when the car comes to a stop? a) 84.20 kN b) 82.40 kN c) 80.4 kN d) 80.20 kN 10) Upon catching a ball, a cricket fielder swings his hands backwards. The concept behind this is explained by a) Newton's first law of motion b) Newton's second law of motion c) Newton's third law of motion d) The law of inertia

DYNAMICS - NEWTON'S SECOND LAW

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