1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ann [662]
3 years ago
8

A ball is dropped from rest. how fast is the ball going after 3 seconds​

Physics
1 answer:
Airida [17]3 years ago
5 0

Answer:

v = 29.4m/s

Explanation:

Since the ball is dropped at rest,

u = 0m/s

a = 9.81m/s²

Using

v = u + at

After 3 seconds,

v = 0 + (9.81)(3)

v = 29.4m/s

You might be interested in
A 1.50-kg red cart is moving rightward with a speed of 60.0 cm/s when it collides with a 0.50-kg blue cart that is moving leftwa
Nesterboy [21]

Answer:

byd5tre r rte566ed6rtsdfcffdrdrfxvc

Explanation:

7 0
4 years ago
Someone answer? Please
dexar [7]
I don’t know ask your parents
6 0
2 years ago
Give the SI unit. For physics
IrinaVladis [17]

Answer:

metre (m) - unit of length

kilograms (kg) - unit of mass

second (s) - unit of time

ampere (A) - unit of electrical current

kelvin (K) - unit of temperature

mole (mol) - unit of the amount of substance

Explanation:

6 0
3 years ago
Two glasses of water have the same thermal energy so do they have to have the same temperature
Vedmedyk [2.9K]

Before answering this question first we have to understand temperature and thermal energy.

Thermal energy of a substance is defined as the sum total of kinetic ,potential etc. energy  of the substance. When two bodies come in contact with each other,the part of the thermal energy is transferred from hotter body to the cooler one which is called heat.

Temperature is the physical quantity which gives the direction of heat flow and determines whether two thermodynamic systems are in thermal equilibrium or not. Temperature of a thermodynamic system is a measure of average kinetic energy of that system.

If two systems have same average kinetic energy,then two systems must have same temperature.The temperature of a substance increases or decreases due to the change in average kinetic energy.

As per the question the two glasses have same thermal energy.It is told that the two glasses must have same temperature which is wrong.It is because thermal energy does not mean the average kinetic energy of the glass. Kinetic energy is a part of thermal energy.

Hence two glasses may be at different temperature depending on their average kinetic energy.



6 0
4 years ago
Was leeuwenhoek the first person to build a microscope?
Elena L [17]

Answer:

No. He was not the first person who built a microscope. But he made simple (one lens), but the microscopes that he did built were the best ones for that time.

4 0
3 years ago
Other questions:
  • Is Vaseline flammable?
    8·1 answer
  • Rust forms when what reacts with chemicals in rocks
    10·2 answers
  • Torque can be calculated by multiplying the force (N) applied at 90∘ to the lever arm at a distance (m) from the pivot point (po
    5·1 answer
  • A frictionless pendulum of length of 3 m swings with an amplitude of 10o. At its maximum displacement, the potential energy of t
    11·1 answer
  • Q
    13·1 answer
  • How long does GSR last ?
    9·1 answer
  • A railroad handcar is moving along straight, frictionless tracks with negligible air resistance. In the following cases, the car
    6·1 answer
  • What evidence exists that an electric current produces a magnetic field, and what
    9·1 answer
  • I wanna die how do i die.
    7·2 answers
  • The inclined plane in the figure above has two sections of equal length and different roughness. The dashed line shows where sec
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!