By Arthur Beiser
Boiled-down necessities of the top-selling Schaum's define sequence, for the coed with restricted time
What may be higher than the bestselling Schaum's define sequence? for college kids searching for a brief nuts-and-bolts evaluation, it's going to need to be Schaum's effortless define sequence. each booklet during this sequence is a pared-down, simplified, and tightly centred model of its larger predecessor. With an emphasis on readability and brevity, every one new name incorporates a streamlined and up to date structure and absolutely the essence of the topic, awarded in a concise and quite simply comprehensible shape. photo parts comparable to sidebars, reader-alert icons, and boxed highlights characteristic chosen issues from the textual content, light up keys to studying, and provides scholars speedy tips that could the essentials.
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Extra resources for Applied Physics Crash Course (Schaum's Easy Outlines Series)
041-050 1/30/03 9:46 AM Page 48 48 APPLIED PHYSICS The torque exerted by a force is also known as the moment of the force. A force whose line of action passes through O produces no torque about O because its moment arm is zero. Torque plays the same role in rotational motion that force plays in linear motion. A net force F acting on a body of mass m causes it to undergo the linear acceleration a in accordance with Newton’s second law of motion F = ma. Similarly, a net torque t acting on a body of moment of inertia I causes it to undergo the angular acceleration a (in rad/s2) in accordance with the formula t = Ia Torque = ( moment of inertia) (angular acceleration) Remember In the SI system, the unit of torque is newton и meter (Nиm); in the British system, it is the pound и foot (lbиft).
A proper choice of directions for the axes often simpliﬁes the calculations. When all the forces lie in a plane, for instance, the coordinate system can be chosen so that the x and y axes lie in the plane; then the two equations SFx = 0 and SFy = 0 are enough to express the condition for translational equilibrium. 1 A 100-N box is suspended from two ropes that each make an angle of 40Њ with the vertical. Find the tension in each rope. Solution. The forces that act on the box are shown in the free-body diagram of Figure 8-1(a).
Solution. The momentum can be calculated as follows: mv = (50 kg)(6 m/s) = 300 kgиm/s Impulse A force F that acts on a body during time t provides the body with an impulse of Ft: Impulse = Ft = (force)(time interval) You Need to Know The units of impulse are newton-seconds and pound-seconds. When a force acts on a body to produce a change in its momentum, the momentum change m(v2 − v1) is equal to the impulse provided by the force. 2 A 46-g golf ball is struck by a club and ﬂies off at 70 m/s. 5 ms, what was the average force on the ball during the impact?
Applied Physics Crash Course (Schaum's Easy Outlines Series) by Arthur Beiser