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Forces In The Mechanical System
Test Description: Principles of Technology I Subunit 1 - Mechanical Systems Review
Instructions: Answer all questions to get your test result.
1) When an object has had its shape or direction of motion changed, it has been acted upon by a
A
force.
B
mass.
C
spring scale.
D
scalar.
2) Which of the following is used to measure the weight (force of gravity) on an object?
A
torque wrench
B
ruler
C
balance scale
D
spring scale
3) Which of the following statements is correct?
A
Si unit of force = pound; English unit of force = Newton
B
SI unit of force = Newton; English unit of force = pound-mass
C
SI unit of force = Newton; English unit of force = pound
D
SI unit of force = newton-meters; English unit of length = inch-pound
4) If two forces acting on an object are equal in magnitude but opposite in direction, the object is said to be
A
in equilibrium.
B
slowing down.
C
speeding up.
D
unbalanced.
5) Which of the following is a vector quantity?
A
100 mi/hr due east
B
12 pm
C
70 degrees Fahrenheit
D
50 pounds
6) Which of the following is a scalar quantity?
A
100 degrees Celsius
B
21 revolutions per second, clockwise
C
15 N, due east
D
105 miles per hour, up
7) Which of the following is INCORRECT when adding vectors graphically?
A
They are drawn in any direction.
B
They are added head to tail.
C
They are drawn to a scale.
D
The resultant is the sum of all the vectors.
8) Three forces act on a crate. The first force is 2 lb, right, the second force is 4 lb, left, and the third force is 3 lb left. Which of the following is true?
A
The resultant force is 5 lb, right.
B
The resultant force is 3 lb, left.
C
The resultant force is 3 lb, right.
D
The resultant force is 5 lb, left.
9) Which of the following statements correctly describes the difference between mass and weight?
A
Weight is measured with a balance; mass is measured with a spring scale.
B
Weight changes with a change in location; mass remains the same with a change in location.
C
Weight is dependent only on the amount of matter in an object; mass is dependent on the force of gravity.
D
The unit of weight is kilograms; the unit of mass is newtons.
10) Torque is
A
the product of the length (in pounds) and the force (in feet).
B
the product of the force applied and the length of the lever arm.
C
the product of the force (in pounds) and the length (in newtons).
D
the speed at which a body rotates.
*select an answer for all questions
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