# Glencoe Science Level Green

## Chapter 23: Newton’s Laws of Motion

### Standardized Test Practice

 1 Sound travels a distance of 1.50 m through a material in 0.00450 s. According to the table, what is the material? (13.0K) A) air B) iron C) water D) wood 2 Through which material would sound travel about 6.9 m in 0.0018 s? (13.0K) A) air B) iron C) water D) wood 3 The gravitational force between two rolling balls depends on their masses and which other factor? A) their inertia B) their velocities C) their separation D) their weights 4 About how long would it take a person to walk a distance of 8.5 km at a speed of 2.9 km/h? A) 2.5 h B) 3.2 h C) 2.9 h D) 3.4 h 5 What is the difference in the force of gravity on Earth between an object with a mass of 17.3 kg and an object with a mass of 21.9 kg? A) 0.47 N B) 45 N C) 2.1 N D) 4.6 N 6 What is the displacement of a hiker who walks along the path shown from Start to Finish and back again? (17.0K) A) 12 km B) 0 km C) 24 km southeast D) 44 km southeast 7 A 1.8-N force causes a toy sailboat to move along the water with an acceleration of 0.12 m/s2. What is the mass of the sailboat? A) 0.22 kg B) 1.3 kg C) 15 kg D) 6.7 kg 8 What force makes it harder to start a desk moving than to push the desk across the floor? A) inertia B) rolling friction C) static friction D) sliding friction 9 A person pushes against a 9.2-kg box with a force of 11.5 N. The frictional force on the box is 2.1 N. What is the acceleration of the box? A) 0.86 m/s2 B) 0.92 m/s2 C) 1.0 m/s2 D) 1.3 m/s2 10 A train moves along a straight section of track at a velocity of 82 km/h east. A person walks toward the back of the train with a velocity of 2 km/h west. What is the velocity of the person relative to the ground? A) 80 km east B) 80 km west C) 84 km east D) 84 km west
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