A skier has an acceleration of 2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s?

Answers

Answer 1
Answer: (Assuming acceleration is -2.5m/s2) 7.2 seconds.
Answer 2
Answer: a = 2.5 m/s²

since , we have to stop so v = 0 m/s ( final velocity)

u = 18 m/s

t = ?

using ,

⇒ v = u + at

⇒ 0 = 18 + 2.5t

by this we are getting t<0 , since , t cant be -ve , Check your question

Related Questions

Which of the following occurs when the fight-or-flight response is triggered?
According to the exercise principle of balance, a workout should __________.a. address all components of fitness b. focus on balance and coordination c. target specific areas for improvement d. vary exercise activities over time
A sample of gold has a mass of 38.6 grams and a volume of 2 cm3. What is the density of gold
If the velocity of a body changes from 13 m/s to 30 m/s while undergoing constant acceleration, what's the average velocity of the body? A. 28 m/s B. 17 m/s C. 21.5 m/s D. 19.5 m/s
the resistance of a wire of length 80cm and of uniform area of cross-section 0.025cmsq., is found to be 1.50 ohm. Calculate specific resistance of wire in SI units, Help please

There are 10 apples in a one-kilogram bag of apples. What is the average mass of each apple in the bag?Give your answer in units of kilograms and grams.

Answers

wouldn't it be .1 kilograms?.
1 apple=.1
2 apples=.2
3 apples=.3
4 apples=.4
5 apples=.5
6 apples=.6
7 apples=.7
8 apples=.8
9 apples=.9
10 apples= 1.0 kilogram

What is the border between two tectonic plates called?

Answers

The boundary between two plates is known as a tectonic plate boundary.

What is tectonic plate?

The widely recognized scientific hypothesis known as plate tectonics states that the Earth's lithosphere is made up of manymajor tectonicplates that have been gently moving since around 3.4 billion years ago.

tectonic plates are formed convection currents are created by the intense heat and pressure that exists within the earth. The tectonic plates that make up the earth's crust shift as a result of these currents.

The tectonic plates move slowly, continuously, and in a variety of directions. Some of them are traveling past each other while others are moving aside from one another.

The border between two tectonic plates called boundary.

To learn more about tectonic plates refer to the link:

brainly.com/question/19317822

 #SPJ2

The border between two tectonic plates is called a boundary.

Hope this helps!

How does a parallel circuit differ from a series circuit? A. A parallel circuit has one path for electrons, but a series circuit has more than one path. B. A series circuit has one path for electrons, but a parallel circuit has more than one path. C. A parallel circuit includes more than one resistor, but a series circuit has one resistor. D. A parallel circuit has a power source,

Answers

A series circuit has only one path for current,
while a parallel circuit has more than one.

Answer:

A series circuit

Explanation:

If a car goes along a straight road heading west and speeds up from 25 ft/s to 60 ft/s in 5 s, calculate the acceleration.

Answers


Acceleration  = 

         (change in speed) / (time for the change)
and
         direction of the change.

Change in speed = (end speed)-(start speed) = (60 - 25) = 35 f/s
Time for the change = 5 sec
Direction of the change = west

                 Acceleration  =  7 ft/sec² west .

Transforme 0,4m em mm

Answers

1m = 1000 mm

0,4m = 0,4 * 1000 = 400mm

How does heat differ from thermal energy

Answers

Ok, so the easiest thing to do would be to first figure out the definitions, and then compare the terms from there. So, thermal energy is basically the inside or internal temperature thats part of a system due to its temperature. And, the definition of heat is high in temperature, or or something having the quality of being hot. So, if you use those definitions, you can come up with various differences. One of those differences could be that heat is the overall temperature or measure of the heat of an object, while thermal energy can be measured as the kinetic energy held within free particles or, the thermal energy per particle.

Final answer:

Thermal energy is the total internal kinetic energy due to the random motion of particles in an object, while heat is a form of energy transfer that happens due to a temperature difference between two objects or systems.

Explanation:

Heat and thermal energy are related concepts in physics but they are not the same thing. Thermal energy is the total internal kinetic energy of an object due to the random motion of its atoms and molecules. It is dependent on the temperature, mass, and type (or specific heat) of the material.

Heat, on the other hand, is a form of energy transfer that occurs due to a temperature difference between two objects or systems. It is the process of transfer of thermal energy from a hotter object to a cooler one. So, heat is a form of thermal energy in transit, typicallyg transferrin from areas of high temperature to areas of low temperature.

Learn more about difference between heat and thermal energy here:

brainly.com/question/32016762

#SPJ6