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Description
Flashcards by louis sartori, updated more than 1 year ago
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Created by louis sartori
over 9 years ago
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| Question | Answer |
| what is center of mass? | In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero. |
| how do you find an objects center of mass? | The concept of the center of mass is that of an average of the masses factored by their distances from a reference point. In one plane, that is like the balancing of a seesaw about a pivot point with respect to the torques produced. |
| how does an objects center of mass effect it when tilting? | Objects with a wide base, and a low center of mass, are more stable than those with a narrow based and a high center of mass. |
| How do you calculate the time period for a pendulum? | T = time period in seconds, s f = frequency in Hertz, Hz |
| What is a simple pendulum? | A plumb line is an example of a simple pendulum. This is a simple machine consisting of a weight (called a bob) suspended from a suspension point by a thin piece of material such as string or a chain. The bob should be free to swing. |
| what are some common examples of every day pendulums? | Common examples of pendulums include: swings at playgrounds some fairground rides - eg pirate ship rides the inside mechanisms of some clocks and grandfather clocks |
| What is circular motion | In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation. |
| What is terminal velocity? | the constant speed that a freely falling object eventually reaches when the resistance of the medium through which it is falling prevents further acceleration. |
| What is resultant force? | A resultant force is the single force and associated torque obtained by combining a system of forces and torques acting on a rigid body. The defining feature of a resultant force, or resultant force-torque, is that it has the same effect on the rigid body as the original system of forces. |
| what is the turning effect of a force called? | the moment |
| what must be balanced if an object is not turning? | the clockwise and anticlockwise moment around the pivot |
| when is work done? | when a force causes an object to move through a distance |
| when is something acting elasticity? | when it returns to it's former shape after the force is taken away |
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