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Download Cracking the AP physics B exam by Princeton Review PDF

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Vectors -- Kinematics -- Newton's legislation -- paintings, strength, and tool -- Linear momentum -- Uniform round movement & Newton's legislations of Gravitation -- Oscillations -- Fluid mechanics -- Thermal physics -- electrical forces and fields -- electrical capability and capacitance -- direct present circuits -- Magnetic forces and fields -- Electromagnetic induction -- Waves -- Optics -- Atomic and nuclear physics

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Is it possible to move with constant velocity but not constant speed? Solution. The answer to the first question is yes. For example, if you set your car’s cruise control at 55 miles per hour but turn the steering wheel to follow a curved section of road, then the direction of your velocity changes (which means your velocity is not constant), even though your speed doesn’t change. The answer to the second question is no. Velocity means speed and direction; if the velocity is constant, then that means both speed and direction are constant.

Speed is a scalar. However, we will also need to include direction in our descriptions of motion. We just learned about displacement, which takes both distance (net distance) and direction into account. ) Because ∆x is a vector, is also a vector, and because ∆t is a positive scalar, the direction of is the same as the direction of ∆x. The magnitude of the velocity vector is called the object’s speed, and is expressed in units of meters per second (m/s). Note the distinction between speed and velocity.

In fact, after time t = 3 s, the velocity became more negative, indicating that the direction of motion was negative at increasing speed. 5 s to time t = 6 s? 5 s to t = 6 s is horizontal, its slope is zero, which implies that the acceleration is zero, but you can also see this from looking at the graph; the object’s velocity did not change during this time interval. -time graph is given: How far did the object travel during a particular time interval? For example, let’s figure out the displacement of the object from time t = 4 s to time t = 6 s.

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