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IB Physics

inertia

### When an object experiences uniform circular motion, the direction of the net force is

is directed toward the center of the circular path

### A pilot executes a vertical dive then follows a semi circular arc until it is going straight up. Just as the plane is at its lowest point, the force on him is

more than mg, and pointing up

(2gr)^1/2

g downward

### what force is needed to make an object move in a circle?

centripetal force

(rg)^1/2

circular motion

### what is the term for the net force directed toward the center of an object's circular path?

centripetal force

42.4 km/h

### when an object experiences uniform circular motion, the direction of the acceleration is

directed toward the center of the circular path

### which of the following can be a centripetal force?

all of the above (tension, friction, and gravity)

2.5v²/g

8.0 m/s²

mv²/r

### a car goes around a curve of radius r at a constant speed v. then it goes around the same curve at half of the original speed. what is the centripetal force on the car as it goes around curve for the second time, compared to the first time?

one fourth as big

### consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity

it is moving in a circle

twice as big

### what type of acceleration does an object moving with constant speed in a circular path experience?

centripetal acceleration

### when a car makes a sharp left turn, what causes the passengers to move toward the right side of the car?

centrifugal force

### an object moves in a circular path at a constant speed. compare the direction of the object's velocity and acceleration vectors

the vectors are perpendicular

### a car goes around a curve of radius r at a constant speed v. what is the direction of the net force on the car?

toward the curve's center

### when an object is moving with uniform circular motion, the object's tangential speed

is perpendicular to the plane of motion

(4π²f²r)/g

### when an object is moving with uniform circular motion, the centripetal acceleration of the object is

directed toward the center of motion

2(gr)∧½

### is it possible for an object moving with a constant speed to accelerate? explain.

yes although the speed is constant the direction of the velocity can be changing

### is it possible for an object moving around a circular path to have both centripetal and tangential acceleration?

yes, this is possible if the speed is changing.

Example: