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WorksheetsForces and Newton's Laws Finals Review
Total questions: 27
Worksheet time: 5hrs 53mins
Consider the traffic light (mass of 15.0 kg) suspended from two wires as shown in Figure. Neglecting the masses of the wires, What is the correct equation?
Fnet=T2x+T1x=0
Fxnet=T2x-T1x=0
T2ycos45=T2x-T1x
Fxnet=T2y+T1x=0
Consider the traffic light (mass of 15.0 kg) suspended from two wires as shown in Figure. Neglecting the masses of the wires, What is the correct equation to solve for y component?
T1y+T2y=w
T1y-T2y=w
T1y+T2y=T1x
T1cos (30)= T2Cos (45)
Consider the traffic light (mass of 15.0 kg) suspended from two wires as shown in Figure. Neglecting the masses of the wires, find the tension of T1
(a)
a 75.0-kg man (weight of about 165 lb.) standing on a bathroom scale in an elevator. if the elevator accelerates upward at a rate of 1.20m/s2. What is his weight in newton's while the elevator is accelerating upward?
(a)
A dustbin of mass 12 kg standing on horizontal ground is pushed by a horizontal force of 72 N in the rightward direction. If the coefficient of friction is 0.4, what is the net force (to the whole number)
(a)
A trunk of mass 30 kg is standing on a horizontal floor. The coefficient of friction, μ, between the trunk and floor is 0.3. What is the maximum force that can be applied without moving the box. (round to the whole number)
(a)
The resistance of an object to any change in its motion is called ______________________.
inertia
friction
gravity
weight
A semi-truck driving down the interstate hits a grasshopper that smashes on the windshield. If the truck applies a 565 N force on the grasshopper, what is the magnitude of the force that the grasshopper applies to the truck?
<565 N
565 N
>565 N
0 N
A baseball and a solid gold metal ball of equal size are dropped at the same time. Ignoring air resistance, which ball has the greater acceleration?
the baseball
the gold ball
they both have the same acceleration
there is not enough information to determine this
The tendency of an object to resist changes in its motion is...
inertia
force
acceleration
velocity
The force that opposes motion between two surfaces in contact with each other.
inertia
friction
momentum
gravity
If the object in this picture is in equilibrium, What is the force of friction?
0
12
8
4
Which two of these forces act on parachutes?
Air Resistance
Gravity
Thrust
Kinetic Energy
What causes an object to fall faster?
Smaller surface area
Larger surface area
If it has a parachute
If it is softer
When a falling object stops accelerating and falls at a constant speed, it is
fluency
constant velocity
acceleration
terminal velocity
Which best describes why a falling object will reach its terminal velocity?
Gravity force is equal and opposite air resistance force.
Air resistance force is equal and opposite the freefall velocity.
Gravity force is equal and opposite the object's mass.
The object's mass is equal and opposite the gravity force.
A rightward force of 32 N is applied to a 7-kg object to move it across a rough surface with a rightward acceleration of 4.2 m/s/s. Use the diagram to determine the gravitational force.
(a)
A rightward force of 32 N is applied to a 7-kg object to move it across a rough surface with a rightward acceleration of 4.2 m/s/s. Use the diagram to determine the frictional force.
(a)
A rightward force of 32 N is applied to a 7-kg object to move it across a rough surface with a rightward acceleration of 4.2 m/s/s. Use the diagram to determine the net force
(a)
A rightward force of 32 N is applied to a 7-kg object to move it across a rough surface with a rightward acceleration of 4.2 m/s/s. Use the diagram to determine the coefficient of friction (thousandths place, unitless)
(a)
The sign is supported by a diagonal cable and a rigid horizontal bar. If the sign has a mass of 50 kg, then determine the tension in the diagonal cable that supports its weight
(a)
