Physics 1301 Final (tests 1, 2, and 3) || with 100% Error-free Answers.
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Physics 1301 F
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Physics 1301 F
Did Galileo develop a more complete theory of motion than that of Isaac Newton? correct answers No
Is the mass of an object the same as its weight? correct answers No
If a curve is banked, is it possible for a car to negotiate the curve even when the frictional force is zero due to very slick...
did galileo develop a more complete theory of moti
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Physics 1301 Final (tests 1, 2, and 3) || with 100% Error-free
Answers.
Did Galileo develop a more complete theory of motion than that of Isaac Newton? correct
answers No
Is the mass of an object the same as its weight? correct answers No
If a curve is banked, is it possible for a car to negotiate the curve even when the frictional force
is zero due to very slick ice? correct answers Yes
Did Ptolemy's view of the solar system require motion of the Earth, rotational or otherwise?
correct answers No
Is the total mechanical energy conserved in the motion of a pendulum? correct answers Yes
A heavy ball with a mass of 3kg is observed to accelerate at a rate of 6 m/s^2. What is the net
force acting on the ball? correct answers 18N
F=ma
A pulled tablecloth exerts a frictional force of 0.5N on a plate with a mass of 0.5kg. What is the
acceleration of the plate? correct answers 1 m/s^2
F=ma
What is the weight of a 50kg mass? correct answers 500N
weight=massxgravity
At a given instant in time, a 20kg rock is observed to be falling with an acceleration of 7.5
m/s^2. What is the magnitude of the force of air resistance acting upon the rock at this instant?
correct answers 50N
F(air)= 20(10)-20(7.5) = 50N
A car rounds a curve with a radius of 25m at a speed of 25m/s. What is the centripetal
acceleration for the car? correct answers 25m/s^2
a(centripetal)=v^2/r
A 0.5kg ball moving in a circle at the end of a string has a centripetal acceleration of 5m/s^2.
What is the magnitude of the centripetal force exerted by the string on the ball to produce this
acceleration? correct answers 2.5m/s^2
F(centripetal)=ma(centripetal)
Two 400kg masses are separated by a distance of 30m. Using Newton's law of gravitation, find
the magnitude of the gravitational force exerted by one of the masses on the other (G=6.67E-11
Nm^2/kg^2) correct answers 1.186E-8 N
F=G (m(one)xm(two)/r^2)
, A force of 20N used to push a chair across a room does 200J of work. How far does the chair
move in this process? correct answers 10m
W=fd
A 0.2kg ball has a velocity of 15m/s. How much work would be required to stop the ball? correct
answers -22.5J
KE=(1/2)mv^2
To stretch a spring a distance of 0.1m from the equilibrium position, 30J of work is done. What
is the spring constant of the spring? correct answers 6,000 N/m
W= (1/2)kx^2
-solve for k
Does the length of time that a force acts on an object have any effect on the strength of the
impulse produced? correct answers Yes
Are impulse and force the same thing? correct answers No
Is the principle of conservation of momentum always valid, or are there special conditions
necessary for it to be valid? correct answers Yes, conservation of energy is always true.
If an object has a constant rotational acceleration, is its rotational velocity also constant? correct
answers No
Is it possible to add heat to a substance without changing its temperature? correct answers Yes
A force of 50N acts on a ball for 0.2 sec. What is the final momentum of the ball? correct
answers 10 kg m/s
50 x 0.2
A ball traveling with an initial momentum of +4.8 kg m/s bounces off a wall at 4.8 kg m/s. What
is the impulse required to produce the change in momentum? correct answers -9.6kg m/s
final momentum-initial momentum= -4.8-4.8= -9.6
A railroad car with a mass of 15,000kg collides and couples with a second car of mass 10,000kg
that is initially at rest. The first car is moving at a speed of 5m/s before the collision. If external
forces can be ignored, what is the final velocity of the two cars after they couple? correct
answers 3m/s
(m1+m2)v(final)=(m1i x v1i) + (m2i x v2i)
A 2,550kg truck traveling with a velocity of 30m/s due south collides head-on with a 2,000kg car
traveling with a velocity of 20m/s due north. They stick together after the collisions. What is the
size and direction of the total momentum of the two vehicles after they collide? correct answers -
8m/s
(m1+m2)v(final)=(m1i x v1i) + (m2i x v2i)
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