![]() The frictional force would oppose the applied force, so we would find the net force by subtracting friction: We’re told that the frictional force is 1 N. Remember that you use cos to find the horizontal components of force. The child is sliding the block horizontally along the floor, so you need the horizontal component of the applied force. Just pick either A or C and move on.įinally, to answer this question down you’re going to have to break down the applied 10N force. If you know your units, you can quickly eliminate B and D. That’s wrong! Acceleration is in meters per seconds squared. Two of the answer choices have the units listed as Newtons. In fact, I routinely tell my tutoring students that if they learn nothing else in physics, they need to LEARN UNITS! In this question, we’re asked for acceleration. It’s hugely important on the test to be familiar with units. ![]() Next, let’s say you remember a bit of physics but don’t really know how to solve this question. Just guess between A, B, C and move on quickly. That’s a “panic answer” and the MCAT writers put it in there as a trap. For example, in this question you probably shouldn’t guess 9, since that’s just the subtraction of the 10 and the 1 listed in the question. Try to avoid picking answers that are just the simple addition or subtraction of numbers listed in the question itself. It’s okay to guess – in fact, you have to! Don’t leave anything blank on the test! If you’re going to have to guess, guess smart. The MCAT covers a huge array of topics, and sometimes we’ll see a topic we just didn’t get time to study. Like most questions on the MCAT, this one can be approached a couple of different ways.įirst, if you have no idea what you’re doing, you’re going to have to guess. Try your hand at this sample problem (click to enlarge): Mastering the Physical Sciences portion of the MCAT first requires mastering the fundamental science concepts that the MCAT will test.īy far, the physics questions the MCAT most likes to ask relate to kinematics and forces.
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