Higher Revision Cards
... v = final velocity of body, in metres per second (m/s) The term Ft is the impulse. The term mv-mu is the effect of the impulse and is the change in momentum. If re-arranged to F=(mv-mu)/t, the term (mv-mu)/t is the rate of change of momentum, and is another definition of force. When the force is not ...
... v = final velocity of body, in metres per second (m/s) The term Ft is the impulse. The term mv-mu is the effect of the impulse and is the change in momentum. If re-arranged to F=(mv-mu)/t, the term (mv-mu)/t is the rate of change of momentum, and is another definition of force. When the force is not ...
V K M I + =
... A solid cylinder, with mass m, inner radius r and outer radius R, being pulled by a horizontal force F at radius r? If the cylinder does not slip then what is the angular acceleration? 1. Στ = -rF = I α N 2. I = mR2 + Icm = 3/2 mR2 F α = -rF / (mR2 + Icm) = -2Fr / 3R ...
... A solid cylinder, with mass m, inner radius r and outer radius R, being pulled by a horizontal force F at radius r? If the cylinder does not slip then what is the angular acceleration? 1. Στ = -rF = I α N 2. I = mR2 + Icm = 3/2 mR2 F α = -rF / (mR2 + Icm) = -2Fr / 3R ...
Torque, Moment of Inertia and angular motion
... ** In an equation, if the symbol is for a rotational quantity, it must be in radians. Sometimes radians "just appears" or simply "disappears" do not be alarmed by this. This is due to the definition of radians. ...
... ** In an equation, if the symbol is for a rotational quantity, it must be in radians. Sometimes radians "just appears" or simply "disappears" do not be alarmed by this. This is due to the definition of radians. ...
Force and Acceleration
... Friction acts on materials that are in contact with each other, and it always acts in a direction to oppose motion. ...
... Friction acts on materials that are in contact with each other, and it always acts in a direction to oppose motion. ...
BBA IInd SEMESTER EXAMINATION 2008-09
... A 3-phase squirrel cage induction motor takes a starting current of 6 times the full load current. Find the starting torque as a percentage of full load torque if the motor is started using star delta starter; the full load slip of the motor being 4%. ...
... A 3-phase squirrel cage induction motor takes a starting current of 6 times the full load current. Find the starting torque as a percentage of full load torque if the motor is started using star delta starter; the full load slip of the motor being 4%. ...
Document
... • AQA only ask you to analyse five joints. They are all 3rd order levers except for the ankle which is a 2nd order lever and extension of the elbow and knee joints which are 1st order levers. • Name and sketch the lever system that operates at the ankle joint. [3] ...
... • AQA only ask you to analyse five joints. They are all 3rd order levers except for the ankle which is a 2nd order lever and extension of the elbow and knee joints which are 1st order levers. • Name and sketch the lever system that operates at the ankle joint. [3] ...
According to Newton`s ______ law, an object with no net force
... 47. (P3.4g)A 0.10 kg lump of clay is moving to the right at 15 m/s. It hits a wall and stops. The impact lasts for 0.003s. a. If the time of impact was increased, what would happen to the average force on the clay? b. If the time of impact was decreased, what would happen to the average force on the ...
... 47. (P3.4g)A 0.10 kg lump of clay is moving to the right at 15 m/s. It hits a wall and stops. The impact lasts for 0.003s. a. If the time of impact was increased, what would happen to the average force on the clay? b. If the time of impact was decreased, what would happen to the average force on the ...
LEVERS
... lies between the fulcrum and effort. Thus the effort(force) arm is always greater than the resistance arm Mechanical Advantage: Thus the mechanical advantage of this lever is always greater than 1 FA ...
... lies between the fulcrum and effort. Thus the effort(force) arm is always greater than the resistance arm Mechanical Advantage: Thus the mechanical advantage of this lever is always greater than 1 FA ...
acceleration ~ net force
... • When falling in air, it is obvious that air resistance (a frictional force) does have an affect on the NET force of the falling objects – it decreases it. • The net force is equal to the force or weight of the object MINUS its air resistance. ...
... • When falling in air, it is obvious that air resistance (a frictional force) does have an affect on the NET force of the falling objects – it decreases it. • The net force is equal to the force or weight of the object MINUS its air resistance. ...
Friction
... Objects on an incline will often stay put. There must be a force that holds the object in place. ...
... Objects on an incline will often stay put. There must be a force that holds the object in place. ...
Gravity and Friction
... When two surfaces rub the irregularities of one surface get caught on those of the other surface Friction – the force one surface exerts on another when the two rub against each other ...
... When two surfaces rub the irregularities of one surface get caught on those of the other surface Friction – the force one surface exerts on another when the two rub against each other ...
study guide answers
... It doesn’t move. It still has a net force of zero. 9. Based on Newton’s first law of motion what happens to an object at motion if there is no unbalanced force acting on it? It keeps moving because there is no unbalanced force stopping it. 10. Explain Newton’s third law. Give an example. For every a ...
... It doesn’t move. It still has a net force of zero. 9. Based on Newton’s first law of motion what happens to an object at motion if there is no unbalanced force acting on it? It keeps moving because there is no unbalanced force stopping it. 10. Explain Newton’s third law. Give an example. For every a ...
Science Study Guide: Matter in Motion How can you determine that
... Balanced forces are two forces that equal out so that the object they are applying force to isn’t moving Unbalanced forces are two forces that are applied to an object that causes it to move Unbalanced forces result in a change of motion If unbalanced forces are pushing towards each other, the ...
... Balanced forces are two forces that equal out so that the object they are applying force to isn’t moving Unbalanced forces are two forces that are applied to an object that causes it to move Unbalanced forces result in a change of motion If unbalanced forces are pushing towards each other, the ...
Rolling resistance
Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface. It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc. is recovered when the pressure is removed. Two forms of this are hysteresis losses (see below), and permanent (plastic) deformation of the object or the surface (e.g. soil). Another cause of rolling resistance lies in the slippage between the wheel and the surface, which dissipates energy. Note that only the last of these effects involves friction, therefore the name ""rolling friction"" is to an extent a misnomer.In analogy with sliding friction, rolling resistance is often expressed as a coefficient times the normal force. This coefficient of rolling resistance is generally much smaller than the coefficient of sliding friction.Any coasting wheeled vehicle will gradually slow down due to rolling resistance including that of the bearings, but a train car with steel wheels running on steel rails will roll farther than a bus of the same mass with rubber tires running on tarmac. Factors that contribute to rolling resistance are the (amount of) deformation of the wheels, the deformation of the roadbed surface, and movement below the surface. Additional contributing factors include wheel diameter, speed, load on wheel, surface adhesion, sliding, and relative micro-sliding between the surfaces of contact. The losses due to hysteresis also depend strongly on the material properties of the wheel or tire and the surface. For example, a rubber tire will have higher rolling resistance on a paved road than a steel railroad wheel on a steel rail. Also, sand on the ground will give more rolling resistance than concrete.