Which one of the following is NOT TRUE concerning mass and weight?

Mass is measured in newtons and weight is measured in pounds

Which of the following does NOT describe an object in equilibrium?

A box box falling freely in the air with no strings attached

The force of sliding friction increases when:

the normal force between surfaces increases.

An object is in equilibrium when:

the net force on the object is zero.

The coefficient of static friction is:

larger than the coefficient of sliding friction.

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Topic 10 Applications of newton's laws

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Applications of newtons laws in physics

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Questions 15

Answers

1
The weight of a 1-kg mass is:
9.8 N
9.8 pounds
4.45 N
1 pound
2
Which one of the following is NOT TRUE concerning mass and weight?
An object has the same mass anywhere; weight changes
Mass is measured in kilograms; weight is measured in newtons
Mass is a property of matter; weight is from gravity .
Mass is measured in newtons and weight is measured in pounds
3
The force called weight comes from:
energy conservation
gravity
friction
acceleration
4
A 25 kg rock weighs 40.8 N on the moon. What is the acceleration of gravity on the moon?
1,020 m/sec2
0.63 m/sec2
0.63 m/sec2
9.8 m/sec2
5
5 N is needed to slide a 2.5 kg block at constant speed over table. The coeff. of friction is
0.5
2
12.5
0.2
6
Which of the following is a unit of mass?
<p>Pound</p>
Kilogram
Newton
Ounce
7
Which of the following is a metric unit that can be used for weight?
Gravity
Kilogram
Pound
Newton
8
Which force acts perpendicular to a surface?
Gravity
Tension
Friction
Normal force
9
Which of the following does NOT describe an object in equilibrium?
A box is resting on a table without moving
A box pushed at constant speed a straight line
A box box falling freely in the air with no strings attached
A box lowered straight down on a rope at constant speed
10
The force of sliding friction increases when:
the relative speed of surfaces increases.
the normal force between surfaces decreases.
the separation between surfaces increases.
the normal force between surfaces increases.
11
Which term describes a situation with zero net force?
Equilibrium
Acceleration
Free Fall
Normal force
12
An object is in equilibrium when:
the weight of the object is zero.
the speed of the object is zero.
the acceleration of the object is 9.8 m/sec2.
the net force on the object is zero.
13
F=m*a is used in what law ?
Third law of Newton
Second law of Newton
Fourth law of Newton
First law of Newton
14
If you kick a wall and you damage it to what law of Newton is it relationed ?
Second law
Third law
First law
Fourth Law
15
The coefficient of static friction is:
larger than the coefficient of sliding friction.
smaller than the coefficient of sliding friction.
a property of static electricity.
equal to the normal force.

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