PHYSICS MIDDLE SCHOOL

A 1,000 kg ball traveling at 5 m/s would have kinetic energy

Answers

Answer 1

Answer:

Answer:

12500 J = 12.5 kJ

Explanation:

Kinetic energy is the energy possessed by a moving object solely due to its motion.

You can get the K.E. of an object using the equation,

K.E. = (1/2)mv²

So you get, for ball

K.E. = (1/2)×1000×5² = 12500 J = 12.5 kJ

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Several objects were dropped from a balcony. Using the data below, determine which statements must be true regarding the rate of force of each falling object. Neglect (ignore) air resistance.Object

Mass

Diameter

Height of drop

Tennis Ball

0.06 kg

6.6 cm

5 m

Baseball

0.15 kg

74 cm

5 m

Bowling Ball

5 kg

21 cm

5 m

Golf Ball

0.04 kg

4.3 cm

5 m

Statement 1: All balls hit the ground at the same time

Statement 2: All balls hit the ground with different forces

Statement 3: The bowling ball hit the ground first and the tennis and golf ball hit the ground last

Statement 4: It is not possible to tell how much force each ball hit the ground with

Answers

Answer:

statement 2

Explanation:

All hit at the same time

How can you cause a physical change?

Answers

Take the sample and . . .
-- Cut a piece off.
-- Sand the surface smooth.
-- Melt it.
-- Paint it a different color.

Question is the image

Answers

Answer:

1=ser

2=both

3=par

4= both

Explanation:

Which type of energy transformation
takes place in the light bulb

Answers

Answer:

electrical energy

Explanation:

in the light bulb, the flow of charge through the filament heats it up and causes it to glow. In this way, the light bulb converts electrical energy to heat energy and light energy.

5. Kelvin applied a rightward force of 302 N to a 29 kg desk to accelerate it across the floor. Thecoefficient of friction between the desk and the floor is 0.750.
a. Calculate the Force Friction
FN

Answers

The force of friction is 213.2 N

Explanation:

The frictional force acting on an object sliding on a surface is given by:

$F_f = \mu mg$

where:

$\mu$ is the coefficient of friction

m is the mass of the object

g is the acceleration of gravity

In this problem we have

$\mu=0.750$

m = 29 kg

$g=9.8 m/s^2$

Therefore, the force of friction is

$F_f = (0.750)(29)(9.8)=213.2 N$

Learn more about friction:

brainly.com/question/6217246

brainly.com/question/5884009

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Modern dual-processing theory is the idea that our minds have —tracks.
O
A. conscious and unconscious
O
B. emotional and rational
O
C. conscious and preconscious
O
D. subconscious and conscious

Answers

Modern dual-processing theory is the idea that our minds have conscious and unconscious tracks. A

Answer:

conscious and unconscious

Explanation:

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Which statement below is correct regarding chemical bonding between atoms?a) two metals will form an ionic bond; two nonmetals will form a covalent bond a) a metal and a nonmetal will form a covalent bond; two nonmetals will form an ionic bond b) a metal and a nonmetal will form an ionic bond; two nonmetals will form a covalent bond c) a metalloid and a metal will form a covalent bond; two nonmetals will form an ionic bond

How is a habitat different from an ecosystem?