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Exam 2: Describing Motion: Kinematics in One Dimension

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Question 101

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Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from 56 mi/h to rest than from 28 mi/h?

A) 3.2 times farther
B) 4 times farther
C) 5.2 times farther
D) 4.8 times farther

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Question 102

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The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field between the plates during this Process?

A) It increases.
B) It remains constant.
C) It decreases.
D) It cannot be determined from the information given.

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Question 103

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A piece of iron rests on top of a piece of wood floating in a bathtub. If the iron is removed from the wood, and kept out of the water, what happens to the water level in the tub?

Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased?

If the acceleration of an object is zero, then that object cannot be moving.

What is the length of the shortest pipe closed on one end and open at the other end that will have a fundamental frequency of 0.060 kHz on a day when the speed of sound is 340 m/s?

Kirchhoff's loop rule is a statement of

You obtain a 100-W light bulb and a 50-W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. If each one is An incandescent bulb of fixed resistance, which statement about these bulbs is correct?

Suppose that an object is moving with a constant velocity. Which statement concerning its acceleration must be correct?

A racquetball strikes a wall with a speed of 30 m/s and rebounds in the opposite direction with a speed of 26 m/s. The collision takes 20 ms. What is the average acceleration of the ball during the collision with the wall?

Consider a capacitor connected across the ac source. As the capacitance is increased, the current through the capacitor will

An astronaut stands by the rim of a crater on the Moon, where the acceleration of gravity is 1.62 and there is no air. To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom. If the depth of the crater is 120 m, how long does it take for the Rock to fall to the bottom of the crater?

A mass on a spring undergoes SHM. When the mass is at its maximum distance from the equilibrium position, which of the following statements about it are true? (There could be more Than one correct choice.)

An ideal step-up transformer doubles a primary voltage of 110 V. What is the ratio of the number of turns in its primary coil to the number of turns in the secondary coil?

If the velocity of an object is zero, then that object cannot be accelerating.

A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, causing the car to slow down with a uniform acceleration of magnitude 3 How far Does the car travel after the driver put on the brakes until it comes to a stop?

In an adiabatic compression, 200 J of work is done on a gas. What is the change in internal (thermal) energy of the gas during this compression?

You drop a stone down a well that is 9.5 m deep. How long is it before you hear the splash? The speed of sound in air is 343 m/s and air resistance is negligible.

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (There could be more than one correct choice.)

During an isochoric process, the internal (thermal) energy of a gas decreases by 50 J. How much heat is added to the gas during this process?