Conceptual
Is the acceleration of a simple harmonic oscillator ever zero? If so, where?
Zero at equilibrium
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What must be your car's average speed in order to travel 235 km in 3.25 hours?
72.3 km/h
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What is the range equation?
R = (v2sin2θ)/g
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A child sitting 1.10 m from the center of a merry-go-round moves with a speed of 1.25 m/s. Calculate the centripetal acceleration of the child.
1.42 m/s2
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What is the SI unit for mass?
kilogram (kg)
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If the net force on a system is zero, is the net torque also zero?
No, the net torque is not zero. It is in force equilibrium not rotational equilibrium.
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A tiger leaps horizontally from a 6.5 m high rock with a speed of 3.5 m/s. How far from the base of the rock will she land?
4.0 m
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What is the equation for a wave on a wire?
v = √((FT)/(m/L))
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480 Hz
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What type of tube only has odd values of n?
A tube that is closed on one end
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Can two vectors of unequal magnitude add up to give the zero vector? Can three unequal vectors? Under what conditions.
1. No. Two unequal vectors can never give zero vector by addition. (MOVE 1 SPACE)
2. But three unequal vectors when added may give a sum of zero. (MOVE 1 SPACE)
3. This can happen when 2 values add up to the exact opposite of the third value. (MOVE 1 SPACE)
A car traveling 95 km/h is 110m behind a truck traveling 75 km/h. How long for the car to reach it?
20 seconds
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What is the Doppler effect equation to find the frequency the observer hears?
f' = f((v+vo)/(v-vs))
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A 15.o kg box is released on a 32° incline an accelerates down the incline at 0.30 m/s^2. Find the friction force impeding its motion.
73N
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What is Newton's Second Law of Motion? Describe in phrases or complete sentences.
The relation between acceleration and force. Specifically, acceleration is proportional to force and inversely proportional to mass.
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Why might your foot hurt if you kick a heavy desk or a wall? Explain using the appropriate law.
When you exert a force on an object, Newton’s Third Law tells us that it exerts the same force back on you. Since your foot is much less massive than a heavy desk or wall, Newton’s Second Law tells us that the acceleration of your foot is much larger than that of the desk or wall.
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A ball thrown horizontally at 22.0 m/s from the roof of a building lands 36.0 m from the base of the building. How tall is the building.
12.9 m
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What is the center of mass equation?
Xcm=(mAxA+mBxB)/(mA+mB)
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A battery with an emf of 12.0V shows a terminal voltage of 11.8V when operating in a circuit with two lightbulbs at 3.0W (at 12.0V) which are connected in parallel. What is the battery's internal resistance?
0.41 ohms
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Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
A. Pressure and Young's modules
B. Planck's constant and Angular momentum
C. Impulse and moment of force
D. Force and rate of change of linear momentum
C. Impulse and moment of force
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A. A woman swimming upstream is not moving with respect to the shore. Is she doing any work?
B. If she stops swimming and merely floats, is work done on her?
A. She is not doing any work because she is not moving with respect to the shore. Her force and the force of the water are equal and opposite, so no movement happens. Regardless of whether she is moving her arms and legs, her center of gravity remains in the same spot. (MOVE 3 SPACES)
B. Yes, the water does work on her because it moves her in the same direction as the force it is applying to her. (MOVE 2 SPACES)
A wheel 33 cm in diameter accelerates uniformly from 240 rpm to 360 rpm in 6.5s. How far will a point on the edge of the wheel have traveled in this time?
34 m
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What is the equation for the temperature coefficient of resistivity?
PT=po[1+α(T-To)]
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A 0.060 kg tennis ball, moving with a speed of 2.50 m/s, collides head-on with a 0.090 kg ball initially moving away from it at a speed of 1.15 m/s. Assuming a perfectly elastic collision, what are the speed and direction of each ball after the collision?
0.88 m/s and 2.23 m/s
(must get both right)
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Which physicist created the concept of inertia: an object in a state of motion possesses an "inertia'' that causes it to remain in that state of motion unless an external force acts on it.
Galileo Galilei
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