All categories

3 years ago

Hell Im Fatima berry i need help PLZZ

Physics

1 answer:

irinina [24]3 years ago

7 0

Answer:

static, sliding, rolling, and fluid friction

Explanation:

Static friction acts on objects when they are resting on a surface. For example, if you are hiking in the woods, there is static friction between your shoes and the trail each time you put down your foot

Sliding friction is friction that acts on objects when they are sliding over a surface. For example, you use sliding friction when you write with a pencil. The pencil “lead” slides easily over the paper, but there's just enough friction between the pencil and paper to leave a mark.

Rolling friction is friction that acts on objects when they are rolling over a surface. For example, this explains why most forms of ground transportation use wheels, including bicycles, cars, 4-wheelers, roller skates, scooters, and skateboards.

Fluid friction is friction that acts on objects that are moving through a fluid. For example, the air resistance on a skydiver

You might be interested in

An astronaut is planning a trip to a newly-discovered planet. According to 2 points

rodikova [14]

Answer:

The new planet has more gravity

Explanation:

gravity force = G m1 m2 / r^2

decresing r or increasing the planet mass will increase the force

3 0

3 years ago

You are standing 30 m from a window that is 30 m off the ground. Your friend tries to toss you something, but only throws it str

pochemuha

Answer:

minimum initial velocity is 21.35 m/s

Explanation:

given data

distance S = 30 m

height h = 30 m

maximum acceleration a = 2 m/s²

to find out

minimum initial velocity that your friend could have thrown the object to enable you to catch

solution

first we get here time with the help of second equation of motion

time = $\sqrt{\frac{2h}{a} }$ ..................1

put her value we get

time = $\sqrt{\frac{2*30}{2} }$

time = 5.477 second

and that is time which tossed object must be take so we apply here again second equation of motion that is

-S = ut - 0.5 × gt² .......................2

-30 = u× 5.477 - 0.5 ×9.8×5.477²

solve it we get

u = 21.35 m/s

so minimum initial velocity is 21.35 m/s

3 0

3 years ago

Read 2 more answers

Which words help you to determine the meaning of the word decelerate in paragraph 3

Novay_Z [31]

Answer:

the words

Explanation:

4 0

3 years ago

If an atom has 3 protons 3 neutrons and 2 electrons what is the electrical charge of the atom

julia-pushkina [17]

Atom is IONISED. charge is +1.6 x 10^-19 Coulombs

7 0

4 years ago

What is radioactivity?

alekssr [168]

Answer:

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles.

the giving off of rays of energy or particles by the breaking apart of atoms of certain elements (as uranium) 2 : the rays or particles that are given off when atoms break apart.

The three most common types of radiation are alpha particles, beta particles, and gamma rays.

HOPE IT HELPS

BRAINLIEST PLEASR

7 0

3 years ago

Read 2 more answers