PHYSICS HIGH SCHOOL

a car traveling at 40m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what is the acceleration?

Answers

Answer 1

Answer:

Velocity - v =0 m/s,

initial velocity - v(0)= 40 m/s

a - acceleration,

time - t = 12 s.

v=v(0) - at

0 = 40m/s - a*12s

12a = 40

a = 3.3 m/s²

Related Questions

When a squid pushes against the water, the squid moves forward because the ______________ pushes against the _______________.
Which type of energy transfer occurs when a beaker of water is heated on a hot plate?
At about 55 meters/sec, a falling parachuter (before the parachute opens) no longer accelerates. Air friction opposes acceleration. Although the effect of air friction begins gradually, imagine that the parachuter is free falling until terminal speed (the constant falling speed) is reached. How long would that take?
Multiples of the fundamental frequency created by plucking a string very quickly, several times in a row is called__________.a.pitchc.scalesb.overtonesd.percussion
What is radiation? Transfer of heat through objects touching the source. Transfer of heat through direct physical contact. Transfer of heat through electromagnetic waves. Transfer of heat through the movement of particles.

A 2.00 × 103 kg car rounds a circular turn of radius 20.0 m. If the road is flat and the coefficient of static friction between the tires and the road is 0.70, how fast can the car go without skidding?

Answers

Answer:

11.7 m/s

Explanation:

In order for the car to remain in circular motion along the road and not to skid, the frictional force between the tires and the road must be equal to the centripetal force.

Therefore, we can write:

$\mu mg = m(v^2)/(r)$

where:

m = 2000 kg is the mass of the car

$\mu=0.70$ is the coefficient of friction

$g=9.8 m/s^2$ is the acceleration due to gravity

v is the speed of the car

r = 20.0 m is the radius of the turn

Substituting and solving for v, we find the speed of the car:

$v=√(\mu gr)=√((0.70)(9.8)(20.0))=11.7 m/s$

What does the ozone layer absorb?a. Microwaves
c. UV radiation
b. X-rays
d. Infra-red radiation

Answers

The ozone layer absorbs UV (ultraviolet) radiation. The answer is letter C. the ozone layer is able to oxidize the electros and photons in the UV rays so that the light that can pass through can be not harmful to humans.

Does an increased volume of a substance increase its density?

Answers

hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
idk

Which is the farthest known planet from the sun? a. Jupiter
b. Saturn
c. Uranus
d. Neptune

Answers

You can remember the order of the planets with the sentence, "My very educated mother just showed us nine planets" for Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.

Answer:

Neptune

Explanation:

a. Define Valency. b. Write the symbol and valency of the following : (i) Oxygen (ii) potassium 7. a. Magnesium burns in Oxygen to form Magnesium Oxide. a) Name the reactants b) Name the Products c) Write the word equation for the above reaction.

Answers

⚘ YourAnswers:

A) Valency is the combining capacity of any element. Valence electrons refers to the electrons found in the outermost shell of the atom of the element.

B) Symbol and valency: