A ball is thrown vertically upward with an initial velocity of 40.0 meters per second. What will be its velocity after 2.00 seconds?
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Assume that a pole vaulter can convert all of his kinetic energy into potential energy. If a 70.0 kg pole vaulter approaches the vault with a velocity of 9.80 m/s, about how high can he get?
Loading …Photo attributed to Marquis Lewis.
A car drives around a circular track at a constant speed of 20 m/s. If the track is flat and has a radius of 200 m, what is the acceleration of the car?
Loading …Photo attributed to Pocket Wiley.
With over 140+ questions posted on MCAT Question of the Day so far, we’ve had many questions that have been more popular with our readers than others.
You’ve read our 5 Most Popular MCAT Biology Questions and MCAT Chemistry Questions, now it’s time to cover our most popular MCAT physics questions, starting from the very beginning.
Here are our 5 most popular MCAT Physics Questions since we started:
1. Missile Velocity: Our second physics question ever posted happens to be a nice conceptual problem. I find the picture to be pretty funny as well.
2. Force and Velocity: Use the force, Luke. A great problem to go back and review, also contains reference to Star Wars.
3. Low Stakes: Funny title + good problem to grab a calculator for = popular question.
4. Whistle While You Run: How much do you know about the Doppler effect? One of the few questions that the majority of students got wrong.
5. String Fixed At Both Ends: Great conceptual question that many students forget. Also, as a bass player, I particularly enjoyed the picture.
Well, that wraps up our list & our “5 Most Popular” series! As you could imagine, this list was quite hard to compile because there are no popular physics questions. I kid, I kid, but in the meantime, you should definitely follow MCAT Question of the Day on Twitter and on Facebook.
Photo attributed to Equipo.
What is the half-life of a radionuclide if 1/16 of its initial mass is present after 2 hours?
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B.
In every half-life, the mass decreases to half its previous value:
1/16 = 1/24
It takes four half-lives to decay down to 1/16 the original mass. Each must be 30 minutes long since the entire process takes two hours.
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Monochromatic light passes through two parallel slits in a screen and falls on a piece of film. The pattern produced is an example of:
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B.
The light passing through each slit is diffracted (bent), and the two resulting beams overlap on the film to form interference patterns.
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A ball with a mass of 1.0 kg sits at the top of a 30o incline plane that is 20.0 meters long. If the potential energy of the ball is 98 J at the top of the incline, what is the potential energy once it rolls half way down the incline?
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B.
Since the height is decreasing, the Ep is decreasing and must have a value less than its initial reading 98 J. D is eliminated because its value is higher than the initial Ep value. C is eliminated because its value is the same as the initial value of the Ep. A is eliminated because the only way to have zero Ep is if the body is at ground level. That leaves B as the only option.
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