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MissTica
2 years ago
6

Only the component of force perpendicular to the direction motion does work. true or false

Physics
1 answer:
const2013 [10]2 years ago
4 0
No.  Only the component of force parallel
to the direction of motion does work.

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The net external force on the propeller of a 3.8 kg model airplane is 8.2 N forward.
monitta

Answer:

<h3>The answer is 2.16 m/s²</h3>

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{8.2}{3.8}  \\  = 2.157894736...

We have the final answer as

<h3>2.16 m/s²</h3>

Hope this helps you

8 0
3 years ago
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to
scoundrel [369]

Answer:

488.6KN

Explanation:

Hello!

the first step to solve this problem we must find the pressure exerted at the bottom of the tank (P) which is the sum of the external air pressure (P1 = 92kPa), the pressure inside the tank (P2 = 100kPa) and the pressure due to the weight of the water (P3), taking into account the above we have the following equation

P=P1+P2+P3

to find the pressure at the bottom of the tank due to the weight of the water we use the following equation

P3=\alpha gh

where

α=density=1  g/cm^3=1000kg/M^3

H=height=14.1m

g=gravity=3.71m/s^2

solving

P3=(1000)(14.1)(3.71)=52311Pa=52.3kPa

P=P1+P2+P3

P=100kPa+92kPa+52.3kPa=244.3kPa

finally to solve the problem we remember that the pressure is the force exerted on the area

P=\frac{F}{A} \\F=PA\\F=(244.3kPa)(2m^2)=488.6KN

3 0
3 years ago
3. A car does an emergency stop from 144 km\h in 4s<br> What was its deceleration?
strojnjashka [21]

Answer:

36?

Explanation:

5 0
2 years ago
. A stationary mass explodes into two parts of mass 4 kg and 40 kg . If the K.E of larger mass is 100 J . The K.E of small mass
alisha [4.7K]

Answer:

10J

Explanation:

KE = (1/2)mv²

100J = (.5)(40kg)v²

v²=(100J)/(20kg)

v²= 5

KE = 5(.5)(4kg)

KE = 10J

3 0
2 years ago
I will give brainly
denis23 [38]
Answer

Around 400 B.C.E, the Greek philosopher Democritus introduced the idea of the atom as the basic building block matter. Democritus though that atoms are tiny, uncuttable, solid particles that are surrounded by empty space and constantly moving at random.

Pls give me BRAINLIEST
8 0
3 years ago
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