Tennessee Science Grade 7

Chapter 13: Forces and Changes in Motion

TCAP Preparation

1
Sound travels a distance of 1.50 m through a material in 0.00450 s. According to the table, what is the material?

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SC.B.1.3.6
A)air
B)iron
C)water
D)wood
2
Through which material would sound travel about 6.9 m in 0.0018 s?

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SC.B.1.3.6
A)air
B)iron
C)water
D)wood
3
The gravitational force between two rolling balls depends on their masses and which other factor? SC.C.2.3.1
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? SC.C.2.3.1
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? SC.C.2.3.1
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?

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SC.A.1.3.1
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? SC.C.1.3.1
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? SC.C.1.3.1
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? SC.C.1.3.1
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? SC.C.1.3.1
A)80 km east
B)80 km west
C)84 km east
D)84 km west
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