Cards in this guide (25)

A 12.0 rock slides off the edge of a bridge and falls into the water 25.0 meters below what is the kinetic energy as it hits the water

What term describes an educated guess about what the answer to a question might be

The custom of watching fireworks on the Fourth of July would be studied by this social science

A jogger runs at an average speed of 5 ms for 3 minutes then finishes with an average speed of 4 ms for 2 minutes What is his average speed in ms for the run

Which of these rates is slowest 1760 yardsminute 60 mihr or 88 ftsec

When you convert it, you will find out that they're all the
same.

A 14 kg cart is coasting down a street at a steady speed of 7 ms what is the kinetic energy of the cart

Kinetic energy = 1/2 M V2 = 0.5 x 14 x 49 = 343 joules

The tangent of an angle equals the ratio of the

Sine of the angle to its cosine.

A 10 kg object has 500 joules of kinetic energy because of its speed How fast is the object traveling

A 10 kg object is lifted up 10 meters How much potential energy has the object gained

A 10 kg rock is pushed off the edge of a bridge 50 meters above the ground What was the kinetic energy of the rock before it began to fall

A 10 kg rock is pushed off the edge of a bridge 50 meters above the ground what was the kinetic energy of the rock at the midway point of its fall

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground What was the kinetic energy of the rock at the midway point of its fall

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground What was the potential energy of the rock before it began to fall

Look at the pie graph pictured How many students ate in the cafeteria

A 1600 kg car is traveling at a speed of 12.5 ms what is the kinetic energy of the car

KE = 1/2 M V2

= (1/2) (1,600) (12.5)2

= 125,000 kg-m2/sec2

= 125,000 newton-meters

= 125,000 joules.

What is the potential energy of a 50 newton object resting on the edge of a cliff 30 meters high

A 50 kg cannon ball is shot horizontally from a cannon at a speed of 80 ms At this speed its kinetic energy will be joules

Kinetic Energy = 1/2 M V2 = (25) (80)2 = 160,000joules.

What is the kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high

As an object falls towards the ground what happens to the kinetic energy of the object

It gains kinetic energy because it is accelerating. Once it hits
the ground, all of it's kinetic energy is converted different types
of energy. Example: drop a rock from your head. When it hits the
ground it create friction and there fore heat, heat is energy. It
also makes a sound when it hits the ground, sound is energy. If you
were to take the heat and the sound energy a d add them together,
you would get the equal amount of potential energy the rock had
when it was at your head ready to drop. Therefore, in this case,
the kinetic energy was coverted to heat energy and sound
energy.

As an object falls towards the ground what happens to the potential energy of the object

As an object falls from a higher level to a lower level, the
gravitational potential

energy that it had at the higher level changes to kinetic
energy.

As more and more potential energy changes to more and more
kinetic energy,

the increase of kinetic energy shows up in the form of greater
speed.

A ramp is 30 meters long and 5 meters high 200 newtons of force must be applied by the mover to push a 1000 newton piano up the ramp What is the amount of work done by the mover

What is the amount of work accomplished by the ramp? - 5000
joules

What is the amount of work done by the mover? - 6000 joules

What is the efficiency of the ramp? - 83%

A pulley system is used to lift a 2000 newton engine up a distance of 3 meters The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor To lift the engine fi

What type of measurement is this 12 feet up scalar or vector

A scalar has distance but no direction.

A vector has distance and direction.

"12 feet up" has distance (12 feet) and direction (up), so is a
vector.

What of these is always part of using the scientific method

A question about an observation

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground. What was the kinetic energy of the rock before it began to fall