Circular Motion
The direction in which tangential acceleration points.
What is parallel to the object's motion?
True or false: an object must have no forces acting on it in order for it to have constant (or zero) velocity.
What is false?
True or false: the weight of an object changes depending on where it is located.
What is true?
The normal force on a block of weight 20 N being pulled up by a rope with force 5 N.
What is 15 N?
How to turn the linear kinematic equations into angular kinematic equations.
What is replace linear variables with angular counterparts (in units of radians)?
Halving the force applied to an object will do this to its acceleration.
What is halve it?
The normal force points in this direction.
What is perpendicular to the surface?
The component of gravitational force that acts parallel to a plane inclined at 30 degrees.
What is Fgsin30o = Fg/2?
The part of an object's velocity that is changing during uniform circular motion.
What is the direction?
The mass of an object that is accelerating at 4 m/s2 to the right while being pushed to the right with force 7 N and to the left with force 2 N.
What is 5/4 or 1.25 kg?
What Δx represents in Hooke's law.
What is displacement from equilibrium?
The factor by which you must change the area to which a force is applied in order to quadruple the pressure.
What is 1/4?
The angle that produces an arc length of 4.4 cm for a circle of radius 6 cm.
What is 0.73 radians, or 42 degrees?
True or false: third law force pairs act on the same object.
What is false?
A lightbulb hangs from a string in an elevator. This is what happens to the tension in the string if the elevator begins to accelerate downwards.
What is decreases?
The maximum coefficient of static friction for a 6 kg object that is just barely at rest when pulled with a force of 3 N.
What is 1/20 = 0.05?
The tension force required in the rope to move an object of mass 0.5 kg in a circle of radius 2 m at a speed of 3 m/s.
What is 9/4 or 2.25 N?
The third law force pair to the following: the Earth's gravitational force pulling the International Space Station into orbit.
What is the ISS's gravitational force pulling on the Earth?
What happens to the magnitude of the friction force once the object starts moving.
What is decreases?
A spring with stiffness 0.1 N/m hangs from the ceiling. This is the amount of mass that must be hung from the spring to stretch it by 5 m.
What is 1/20 = 0.05 kg?