Lab Formatives

It is the reciprocal of period T.

frequency

It is the reciprocal of frequency f.

period

Centripetal force is _____ proportional to mass of the rotating object.

directly

Centripetal force is _____ proportional to centripetal acceleration.

directly

Centripetal force is _____ proportional to speed of the rotating body.

directly

Centripetal force is _____ proportional to radius of the circular path (curvature) of the rotating body.

directly

Centripetal force is _____ proportional to frequency of rotation of the rotating body.

directly

What is the relationship between the counterweight and centripetal force?

equal

Calculate the frequency of the rotation object which completes 250 rotations in 10 seconds.

25 Hertz

If a rotating object has a frequency of 1 KHz. Calculate its period.

1 milisecond

t is aimed that a 500-N balikbayan box be moved from rest along a flat surface by applying a pull. The box started to slide as it was pulled with an applied force of 150N. The box kept on sliding with a constant pull. What is the static frictional force?

150N

It is aimed that a 500-N balikbayan box be moved from rest along a flat surface by applying a pull. The box started to slide as it was pulled with an applied force of 150N. The box kept on sliding with a constant pull. What is the kinetic frictional force

less than 150N

t is aimed that a 500-N balikbayan box be moved from rest along a flat surface by applying a pull. The box started to slide as it was pulled with an applied force of 150N. The box kept on sliding with a constant pull. What is the coefficient of static fri

0.3

500-N balikbayan box... Applied force of 150N... Assuming the platform has a coefficient of static friction of 0.95, the coefficient of kinetic friction is:

less than 0.95

500-N balikbayan box... Applied force of 150N... If the platform is smooth, free from friction, what is the coefficient of static friction?

0

The coefficient of static friction is always _____ the coefficient of kinetic friction.

higher than

The static frictional force is always _____ the kinetic frictional force.

higher than

It is a force that prevents an object from starting to move.

Static friction

It is a frictional force acting on a moving object.

Kinetic friction

The frictional force can be computed by multiplying the _____ force by the coefficient of friction.

normal

It is referred to as energy of motion.

kinetic energy

It is the product of the moving object's mass 𝑚 and speed 𝑣.

kinetic energy

It is the product of the moving object's mass 𝑚 and its height h.

potential energy

This law states that energy can neither be created nor destroyed, only converted from one form to another.

Law of Conservation

The potential energy of a solid object at rest, when acted upon by a force that causes it to move, will be converted to _____ energy.

kinetic

Initially the potential energy of a stationary object, suspended by a string, is 10 kilo Joules. When the string breaks, the object falls down. What happens to its potential energy while the object is falling down?

decreasing

Initially the potential energy of a stationary object, suspended by a string, is 10 kilo Joules. When the string breaks, the object falls down. What happens to its kinetic energy while the object is falling down?

increasing

Initially the potential energy of a stationary object, suspended by a string, is 10 kilo Joules. When the string breaks, the object falls down. What happens to its total energy while the object is falling down?

no change

The potential energy of an stationary object is 10 kilo Joules. If the object is suspended by a string, 10 meters high, what is its potential energy?

102 Joules

Initially the potential energy of an stationary object, suspended by a string, is 10 kilo Joules. When the string breaks, the objects falls down. At a point when its potential energy is down to 2 kilo joules, how much is its kinetic energy?

8 kilo Joules

It is the product of mass and velocity.

Momentum

This is a type of collision where both momentum and kinetic energy are conserved

elastic collision

This is a type of collision where only the momentum is conserved but the kinetic energy is not.

Inelastic collision

The figure below shows what type of collision? figure: Billiards

elastic collision

This figure below shows what type of collision? figure: Before Collision and After Collision of 2 Cars where 1 car loses speed.

Inelastic collision

This figure below shows what type of collision? figure: Newton's Cradle

Elastic collision

This figure below shows what type of collision? figure: Bowling ball Strike

Elastic collision

This figure below shows what type of collision? figure: American football man getting tackled

Inelastic collision

This figure below shows what type of collision? figure: Man playing golf

elastic collision

A 60-kg body is moving with a velocity of 20 m/s. How much is it momentum?

1200 kg.m/s

For the system to be at equilibrium, it should meet one of the two conditions which is: Net force is equal to :

0

For the system to be at equilibrium, it should meet one of the two conditions which is: Net torque is equal to :

0

It is the tendency of an object to rotate about an axis due to a force.

Torque

Find the torque of the system shown below: r = 2m F = 10N (downwards)

T = 20Nm

The system below will rotate in r = 2m F = 10N (downwards)

CW : Clock Wise

The system below will rotate in: r = 2m F = 10N (downwards) F = 20N (upwards)

CCW : Counter Clock Wise

Find the torque of the system shown below: r = 2m F = 10N (downwards) F = 20N (upwards)

20 Nm

What is the net torque of the system below: r1 = 0.5m F1 = 10N (downwards) r2 = 2m F2 = 20N (upwards) F2 = 10N(downwards)

15 Nm

The system below will rotate in: left: r = 3m r1 = 1m F1 = 10N r2 = 2m F2 = 10N r3 = 3m F3 = 10 N right: r = 3m F = 20m

CCW

The system below will rotate in: left: r = 1m F = 10m right: r = 2m F = 5N

is at equilibrium, no rotation