All categories

3 years ago

(v) Which of the following is

Physics

1 answer:

nirvana33 [79]3 years ago

8 0

Frictional force from the friction caused between the course pavement and the rubber tire. It wears down the tire.

You might be interested in

A force of 100.0N is appliesd to an object of mass 85.0kg. what is the object acceleration

kumpel [21]

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = \frac{f}{m} \\$

f is the force

m is the mass

From the question we have

$a = \frac{100}{85} = \frac{20}{17} \\ = 1.176470...$

We have the final answer as

Hope this helps you

3 0

3 years ago

Which velocity graph shows the car moving toward the right (away from the origin) at a steady (constant) velocity?

slega [8]

Explanation:

$\text{Velocity is defined as the average displacement per unit time.}$

$\text{Since the car is moving at a steady velocity, the velocity does not change over time, it shows a horizontal line on the }v-t\text{ graph}$

$\text{Therefore, only option 2,5,8 matches this requirement.}$

$\text{Since the car is moving to the right, which is defined as the positive direction in this question, the velocity (}v\text{) is also positive.}$

$\text{Therefore, only option 5 is correct.}$

6 0

3 years ago

A force of 1.50 N acts on a 0.20kg trolley so as to accelerate it along an air track

Veseljchak [2.6K]

Answer:

2.12m/s

Explanation:

Given parameters:

Force on trolley = 1.5N

Mass of trolley = 0.2kg

Unknown:

Velocity of the trolley = ?

Solution:

To solve this problem, we first find the acceleration of the trolley;

Force = mass x acceleration

Acceleration = $\frac{Force }{mass}$

Insert the parameters and solve;

Acceleration = $\frac{1.5}{0.2}$ = 7.5m/s²

Now to find the acceleration;

Initial velocity = 0m/s

v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the distance

Distance = 30cm and this is 0.3m

v² = 0² + 2(7.5)0.3 = 4.5

v = √4.5 = 2.12m/s

8 0

3 years ago

The pump in a water tower raises water with a density of rhow = 1.00 kg/liter from a filtered pool at the base of the tower up h

oee [108]

Answer:

Explanation:

mass of the water being lifted per second

m = volume x density

= 6.2 x 1 = 6.2 kg

height by which water being lifted

h = 75 - 21

= 54 m

increase in potential energy of water per second

mgh

6.2 x 9.8 x 54

= 3281.04 J /s

= 3281.04 W.

3 0

3 years ago

Pls help

Andrej [43]

Answer:

Shorter waves vibrate at higher frequencies and have higher energies. Red light has a frequency around 430 terahertz, while blue's frequency is closer to 750 terahertz. Red photons of light carry about 1.8 electron volts (eV) of energy, while each blue photon transmits about 3.1 eV.

Explanation:

Hope that helps if not so sorry.

3 0

3 years ago