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3 years ago

5. How does a jack make changing a tire easier?

Physics

1 answer:

strojnjashka [21]3 years ago

4 0

Answer: An jack makes changing a tire easier because it lifts up the car to get the tire off of the ground.

Explanation:

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A massless rope passes over a massless pulley suspended from the ceiling. A 4-kg block is attached to one end and a 5-kg block i

borishaifa [10]

The acceleration on the 5kg block is 1.088m/s^2

Data;

mass(a) = 4kg
mass (b) = 5kg
acceleration of the 5kg block.

<h3>The Acceleration on the 5kg block</h3>

To solve this question, we just need to use Newton's second law of motion which states that "the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it."

$F_n_e_t = M_t_o_t_a_l * a\\F = ma\\F_n_e_t = mg\\$

But then the force on both sides will be

$mg = ma\\5g - 4g= (4+5) a\\(5-4)g = 9a\\g = 9a\\a = \frac{g}{9} \\a = \frac{9.80}{9} \\a = 1.088 m/s^2$

The acceleration on the 5kg block is 1.088m/s^2

Learn more on newton's second law of motion here;

brainly.com/question/3050695

brainly.com/question/13447525

4 0

2 years ago

A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called

ElenaW [278]

A fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.

<h3>What is speed density fuel injection system?</h3>

Speed density fuel injection system is a fuel delivery method.

This system relies on a combination of sensor and an intake air temperature sensor to measure the amount (or mass) of air entering the engine.

Thus, a fuel injection system that does not use a sensor to measure the amount (or mass) of air entering the engine is usually called speed density type of system.

Learn more about speed density here: brainly.com/question/26024294

7 0

3 years ago

(NEED HELP BADLY)

spin [16.1K]

Answer:

The answer to your question is below

Explanation:

Data 1

mass 1 = 250

mass 2 = 250 kg

gravity constant = 6.67 x 10⁻¹¹ Nm²/kg²

distance = 8 m

Formula

$F = G\frac{m1m2}{r^{2} }$

Substitution

$F = 6.67 x 10^{-11} \frac{250 x 250}{8^{2} }$

Result

F = 0.000000065 N

Data 2

mass 1 = 1000 kg

mass 2 = 1000 kg

distance = 5 m

Substitution

$F = 6.67 x 10^{-11} \frac{1000 x 1000 }{5^{2} }$

Result

F = 0.000002667 N

8 0

4 years ago

Choose all the answers that apply.

slava [35]

<h2>So, the correct answers are:</h2>

Travels in longitudinal waves

Travels most slowly through a gas

Speeds up when temperature is increased

Is caused by vibration

Explanation for correct answers:

Yes, it does travel in longitudinal waves

Yes, sounds weird, but travels faster in the water

Yes, does speed up when temperature is increased

And yes, Is caused by vibration.

<h2>Wrong answer is:</h2>

Can travel through a vacuum

Explanation for wrong answer:

actually, in space, there is NO sound, because there are no particals for the sound to vibrate with, there's just empty SPACE.

5 0

3 years ago

All the terrestrial planets have

Hoochie [10]

They have solid, rocky surfaces they also have molten heavy-metal core, few moons , and topological features

6 0

3 years ago