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WorksheetsGeneral Physics 1 Quiz 2.1
Total questions: 38
Worksheet time: 38mins
What is a force?
A measure of mass
A push or pull exerted by an object
A type of motion
A type of energy
Which of the following is a noncontact force?
Frictional force
Normal force
Gravitational force
Tension force
What does Newton's first law of motion state?
Force equals mass times acceleration
An object in motion will stay in motion unless acted upon
For every action, there is an equal and opposite reaction
A body at rest will remain at rest unless acted upon by an external force
What is the SI unit of force?
Kilogram
Newton
Pound
Dyne
What is the relationship between mass and inertia?
Mass is independent of inertia
Greater mass means greater inertia
Inertia is a measure of weight
Inertia decreases with mass
What does the second law of motion describe?
The relationship between force and acceleration
The concept of equilibrium
The behavior of noncontact forces
The nature of friction
What is the formula for weight?
W = ma
W = F/m
W = mg
W = m/a
What is static friction?
Friction that opposes motion
Friction that occurs when an object is moving
Friction that is always less than kinetic friction
Friction that acts on a stationary object
What is the angle of repose?
The angle of a vertical wall
The angle of a banked curve
The angle at which an object starts to slide down a slope
The angle of a flat surface
What does the impulse-momentum theorem relate?
Friction and motion
Force and mass
Impulse and change in momentum
Acceleration and velocity
What is the third law of motion?
An object at rest stays at rest
Force equals mass times acceleration
For every action, there is an equal and opposite reaction
An object in motion stays in motion
What is the primary role of friction?
To change direction
To create motion
To increase speed
To resist motion
What happens to the reading of a scale when an elevator accelerates down?
It increases
It decreases
It remains the same
It fluctuates
What is the relationship between the coefficient of static friction and kinetic friction?
They are independent of each other
They are equal
Static friction is greater than kinetic friction
Static friction is less than kinetic friction
What best defines the importance of free body diagram?
Allows us to draw the representation of forces acting on an object
Allows us to visualize the number, magnitude, and interactions of forces acting on an object.
Allows us to identify the direction and magnitude through using arrows.
Allows us to determine external forces present on the situation.
Which causes acceleration?
inertia
nonzero force
speed
velocity
Which force arises from direct physical contact between two objects?
field force
friction
fundamental force
gravitational force
Which principle explains why we need to wear seatbelts?
impulse-momentum theorem
law of inertia
law of acceleration
law of interaction
Which refers to the tendency of an object to maintain its state of motion?
acceleration
force
inertia
velocity
A 2000 kg car is accelerated uniformly from rest to a speed of 15 m/s in 10 s. What is the magnitude of the unbalanced force acting on the car?
3 x 102 N
3 x 103 N
3 x 104 N
3 x 105 N
Which is always true for a body in equilibrium?
It is at rest.
There are no forces acting on it.
It is moving at constant velocity.
There is no unbalanced force acting on it.
A hammer drives a nail into a piece of wood. Which describes an action-reaction pair?
The hammer exerts a force on the nail; the wood exerts a force on the nail.
The hammer exerts a force on the nail; the nail exerts a force on the hammer.
The hammer exerts a force on the nail; the hammer exerts a force on the wood.
The hammer exerts a force on the nail; the nail exerts a force on the wood.
A lady stands on a weighing scale while inside an elevator that is moving upward at a constant speed. What will be the reading of the scale?
zero
her weight
less than her weight
greater than her weight
A 1.50 kg falling object stops accelerating and continues to move at a constant velocity. What is the amount of the air resistance encountered by the object?
less than 14.7 N
between 0 and 14.7 N
14.7 N
greater than 14.7 N
Which law tells us that the air resistance encountered by a falling object is proportional to its velocity?
Stoke’s law of resistance
Newton’s law of resistance
terminal velocity
da Vinci’s law of air resistance
Which of the following does not affect the force of sliding friction?
area and sliding speed
nature of surface of contact
materials of objects in contact with
normal force pressing the surfaces together
Two blocks of masses m1 and m2, respectively, are connected by a string over a light pulley as shown in the figure to the right. When m1 < m2, what will be the acceleration of the masses?
m1+m2(m1−m2)g
m1−m2(m1+m2)g
m1+m2(m2−m1)g
m1+m2m2g
A student pulls a 10. N block along a rough horizontal surface. The horizontal and the vertical components of the force that he applies are 4.0 N and 3.0 N, respectively. What is the normal force?
(a)
A student pulls a 10. N block along a rough horizontal surface. The horizontal and the vertical components of the force that he applies are 4.0 N and 3.0 N, respectively. If the block is in an impending motion, what is the value of the maximum static friction?
(a)
A student pulls a 10. N block along a rough horizontal surface. The horizontal and the vertical components of the force that he applies are 4.0 N and 3.0 N, respectively. What is the coefficient of static friction?
(a)
A block is sliding at a constant speed down a wooden board inclined at an angle of 23 degrees with the horizontal surface. The mass of the block is 6.5 kg. Find the coefficient of kinetic friction.
(a)
A block is sliding at a constant speed down a wooden board inclined at an angle of 23 degrees with the horizontal surface. The mass of the block is 6.5 kg. Find the kinetic friction.
(a)
A block is sliding at a constant speed down a wooden board inclined at an angle of 23 degrees with the horizontal surface. The mass of the block is 6.5 kg. Explain briefly what would happen if the board is lubricated so that friction is reduced to 75 percent.
The acceleration due to gravity on the surface of Jupiter is 254 percent times that of Earth. An object has a mass of 65 kg here on Earth. What will be its weight at the surface of Jupiter?
(a)
An object with a mass of 34 kg falls from rest to the top of a building. At one instance of its flight, it encounters an air resistance of 312 N. What is its acceleration at this instance?
(a)
An object with a mass of 34 kg falls from rest to the top of a building. At one instance of its flight, it encounters an air resistance of 312 N. What must be the value of air resistance for the object to attain its terminal velocity?
(a)
An object with a mass of 34 kg falls from rest to the top of a building. At one instance of its flight, it encounters an air resistance of 312 N. What is its terminal speed if the drag coefficient is 1.2 N(m/s)^2? Assume that air resistance is proportional to the square of velocity.
(a)
You hang Anya’s picture frame by means of a vertical string. Two strings in turn support this string, as shown in the figure. Each string makes 30 degrees with an overhead horizontal beam. Find the tension in the strings if the weight of the frame is 55 N.
(a)
