PHYSICS HIGH SCHOOL

A mass of 1.0 kg is initially held in place on a ramp of angle 45o at height of 20. meters above the ground. The mass is released and slides to the bottom of the ramp (h=0). There is friction between the mass and the ramp. At the bottom of the ramp, the object has a speed of 10. m/s. The thermal energy was generated by the friction as the mass slides down the ramp is closest to which value?

Answers

Answer 1

Answer:

Answer:

The thermal energy generated by the friction as the mass slides down the ramp is $\bf{146~J}$ .

Explanation:

Given:

The mass of the object is, $m = 1.0~kg$

The angle of the ramp is, $\theta = 45^(0)$

The initial height of the object on the ramp is, $h = 20~m$

The final velocity of the object is, $v = 10~m/s$

When the object is at rest on the ramp, its total energy is potential energy. When it moves down the ramp its kinetic energy is increased and potential energy is decreased and a part of its energy is lost to overcome the force of friction. Finally, when it is at the bottom of the ramp, its total energy becomes only kinetic energy.

The total energy of the object at a height $20~m$ on the ramp is given by

$E_(1) &=& mgh\n~~~~&=& (1.0~kg)(9.8~m/s^(2))(20~m)\n~~~~&=& 196~J$

When the object is at the bottom of the ramp, its total energy is given by

$E_(2) &=& (1)/(2)mv^(2)\n~~~~&=& (1)/(2)(1.0~kg)(10~m/s)^(2)\n~~~~&=& 50~J$

So, the energy that is lost as thermal energy is given by

$E &=& E_(1) - E_(2)\n~~~~&=& 196~J - 50~J\n~~~~&=& 146~J$

Related Questions

2. What happens when multiple forces act on an object?A. The object will always move. B. The object will move if the forces are balanced. C. The object will move if the forces are unbalanced. D. The object will always stay in place. 3. An object moves in the direction of the __________ force. A. net B. balanced C. strongest D. weakest
Which equation describes the sum of the two vectors plotted below?
An automobile covered the distance of 240 km between A and B with a certain speed. On its way back, the automobile covered half of the distance at the same speed and for the rest of the trip he increased his speed by 10 km/hour. As a result, the drive back took him 2 5 of an hour less than the drive from A to B. What was the automobile’s speed when it was driving from A to B?
What do ultrasounds use?radio wavesultraviolet waveslight wavessound waves
Determine the weight of a 2959.0-kg car that is moving at a speed of 21 m/s. Enter anumerical answer.

The centripetal force acting on a satellite in orbit A. acts as an unbalanced force on the satellite.
B. changes the direction of the satellite.
C. is a center-directed force.
D. all of the above

Answers

The centripetal force (of gravity) on a satellite in orbit is an
unbalanced force (because there's no equal force pulling
the satellite away from Earth), changes the direction of the
satellite (into a closed orbit instead of a straight line), and
always acts toward the center of whatever curve the satellite
happens to be on at the moment.

Answer : (D) " all of the above "

Explanation :

The forces acting on a satellite are Earth's gravitational force and centripetal force. The properties of centripetal force acting on a satellite in orbit are as follows :

(1) It acts as an unbalanced force on the satellite. This is due to the reason that there is no same force present which pulls the satellite away from the earth.

(2) It changes the direction of the satellite. The satellite is revolving with a constant speed while the direction is kept on changing (in a circular motion).

(3) Centripetal force always acts towards the center.

So, the correct option is (D) " all of the above "

A moving car has momentum. If it moves twice as fast what is it's momentum

Answers

as we know that P=mv .. where m is mass and v is velocity ..this relation shows that momentum has a direct relation with these two quantities .. so when velocity is increased twice
P' = mv
P'=m2v
P' = 2 mv here mv is P so
P'=2P
this shows that momentum will also be doubled by doubling the velocity :)

What distinguishes mass from weight?A.
Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object.
B.
Weight is a measure of the amount of matter in an object, while mass is a measure of the force of gravity on the object.
C.
Mass is a measure of an object's inertial force, and weight is the force exerted by that object on other objects.
D.
Mass and weight are synonyms and ultimately describe the same principle.

Answers

Weight is a measurement of the object's gravitational pull, whereas mass is a measure of the amount of substance in the thing. The right answer is A.

What are mass and weight?

Mass is a measure of a physical body's entire makeup. This term also measures inertia, or the body's resistance to acceleration when a net force is applied. The basic mass unit of the SI is the kilogram.

The weight of an object refers to the gravitational force acting on it. Weight is the term used in many widely used textbooks to describe the gravitational force acting on the object. The mass is a matter present and the weight is the force.

Therefore, the weight is a measurement of the object's gravitational pull, whereas mass is a measure of the amount of substance in the thing. The right answer is A.

To know more about mass and weight follow

brainly.com/question/1415075

#SPJ6

Final answer:

Mass is the measure of how much matter an object has and remains constant regardless of location, while weight is the measure of the force of gravity acting on that object, which varies based on the gravitational environment.

Explanation:

Mass is a measure of the amount of matter in an object. It is a property that reflects how much space that object occupies in three-dimensional space. It remains constant regardless of where the object is.

On the other hand, weight is a measure of the force of gravity acting on the object. Weight can change based on the gravitational force of the environment; for example, an object weighs less on the moon than it does on Earth because the moon's gravitational force is less than Earth's.

So, the answer to your question is A. Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object.

Learn more about Mass and Weight here:

brainly.com/question/34136045

#SPJ6

In which of the following methods of heat transfer is it necessary for the objects to be directly touching one another? A. convection. B. radiation. C. conduction. D. all of these.