Florida Science Grade 6

Chapter 17: Motion, Forces, and Simple Machines

Standardized Test Practice

1.
What is the force needed to lift the weight?

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SC.C.1.3.1
A)30 N
B)40 N
C)60 N
D)60 N
2.
What is the mechanical advantage of the pulley?

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SC.C.2.3.4
A)2
B)1
C)3
D)4
3.
A jogger moves at a speed of 3.2 m/s. She then runs downhill and increases her speed to 4.3 m/s over a 2.5 s period. What is her acceleration? SC.C.1.3.1
A)1.1 m/s2
B)0.44 m/s2
C)2.3 m/s2
D)2.8 m/s2
4.
How much work have you done if you pushed with a force of 18 N on a box while sliding it 3.4 m? SC.C.1.3.1
A)0.19 J
B)0.38 J
C)61 J
D)5.3 J
5.
You walk along a trail at the park for 1.5 h at an average speed of 4.2 km/h. About how far have you walked? SC.C.1.3.1
A)2.8 km
B)3.6 km
C)7.3 km
D)6.3 km
6.
A mover makes an inclined plane by leaning a 2.8-m board against a step that is 0.68 m above the ground. What is the mechanical advantage of the inclined plane? SC.C.1.3.1
A)0.24
B)4.1
C)0.48
D)2.1
7.
If the cart has a mass of 22 kg and the girl pushes with a force of 12 N, what is the cart's acceleration?

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SC.C.1.3.1
A)1.0 m/s2
B)1.8 m/s2
C)2.6 m/s2
D)0.55 m/s2
8.
Which of the following describes the mechanical advantage of a third-class lever? SC.C.2.3.4
A)always less than 1
B)always greater than 1
C)either greater than 1 or equal to 1
D)either less than 1 or equal to 1
9.
If a car at rest accelerates to a speed of 72 m/s in 6.3 s. What is its acceleration? SC.C.1.3.1
A)4.5 m/s2
B)8.8 m/s2
C)11 m/s2
D)14 m/s2
10.
For motion along a straight line, a horizontal line on a speed over time graph indicates that which of the following is zero? SC.C.2.3.5
A)distance
B)acceleration
C)speed
D)velocity
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