# Glencoe Science Level Blue

## Chapter 19: Force and Newton's Laws

### Section 2 Self-Check Quiz-Eng.

 1 Newton's second law of motion states that __________. Need a Hint? A) an object will remain at rest or keep moving in a straight line with constant speed unless a force acts on it B) when a force is applied on an object, there is an equal force applied by the object in the opposite direction C) the force on an object can be found by dividing its mass by its acceleration D) acceleration is calculated by dividing the force exerted on an object by the mass of the object, and that when a force acts on an object, its acceleration is in the same direction as the force 2 A change in motion is described by __________. Need a Hint? A) inertia B) acceleration C) net force D) speed 3 Which of the following statements is true? Need a Hint? A) An object does not accelerate if it turns and maintains constant speed. B) Velocity of a moving object is the distance traveled divided by the time needed to travel the distance. C) When speed increases gradually, average speed and instantaneous speed are the same. D) If a moving object slows down, it is accelerating. 4 __________ is the pull that all objects exert on each other. Need a Hint? A) Resistance B) Friction C) Inertia D) Gravity 5 You are moving a dresser that has a mass of 36 kg; its acceleration is 0.5 m/s2. What is the force being applied? Need a Hint? A) 72 N B) 35.5 N C) 1.8 N D) 18 N 6 The strength of the gravitational force between two objects depends on which of the following? Need a Hint? A) the mass of the larger object B) the velocities of the objects C) the mass of the objects and the distance between them D) the orbits of the objects 7 Gravity causes all object's near Earth's surface to fall with an acceleration of __________. Need a Hint? A) a = F X m B) 9.8 m/s C) 9.8 m/s2 D) 98 m2/s 8 Which of the following is not an acceleration? Need a Hint? A) stopping your bike at an intersection B) slowing your bike ride so you can make it up a hill C) riding your bike faster when you head down a hill D) riding your bike straight down the street at a constant speed 9 In describing the acceleration given a 2-kg object by a 10-N force acting on it, which of these units is appropriate? Need a Hint? A) N B) N/kg2 C) m/s2 D) kg/s2