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3 years ago

How does applying oil to a bicycle help the bicycle to work better?

Physics

2 answers:

dmitriy555 [2]3 years ago

8 0

It Reduces Friction. !

11Alexandr11 [23.1K]3 years ago

6 0

If your add it to the chain then yes because it gets rid of rust

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How does the total momentum of the docked vehicle and station compare to the momentum of each object before the

Xelga [282]

The total momentum before the docking maneuver is and after the docking maneuver is

Explanation:

Linear momentum (generally just called momentum) is defined as mass in motion and is given by the following equation:

Where is the mass of the object and its velocity.

According to the conservation of momentum law:

"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision will be the same as the total momentum of these same two objects after the collision ".

This means, that although the momentum of each object may change after the collision, the total momentum of the system does not change.

Now, the docking of a space vehicle with the space station is an inelastic collision, which means both objects remain together after the collision.

Hence, the initial momentum is:

Where:

is the mass of the vehicle

is the velocity of th vehicle

is the mass of the space station

is the velocity of the space station

And the final momentum is:

Where:

is the velocity of the vehicle and space station docked

5 0

4 years ago

A toy cart moves with a kinetic energy of 30 J. If its speed is doubled, what is its kinetic energy?

klio [65]

Explanation:

KE is directly proportional to the square of velocity / speed.

if speed is 2 times (doubled) the KE will be

${2}^{2}$

= 4 times the original KE

$4 \times (30)$

$= 120 \: j$

8 0

3 years ago

What is the weight of an object when the object has a mass of 22kg

Savatey [412]

Assuming the object is on earth the objects weight would be equal to its mass multiplied by the gravitational field constant

mass=22kg
g=9.80665N/kg

weight=(22 kg) (9.80665 N/kg)=215.7463N

generally g is rounded to be 10 N/kg so for any question where it asks the weight given the mass just multiply by 10 and that should suffice. In this case the answer would be 220 N

5 0

3 years ago

6. If a force of 3000 N is needed to accelerate a car to 3 m/s2, what is the mass of<br> the car?

evablogger [386]

Answer:

Explanation:

The mass of the car can be found by using the formula

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

f is the force

from the question we have

$m = \frac{3000}{3} = 1000 \\$

We have the final answer as

Hope this helps you

4 0

3 years ago

A bicyclist is traveling at a speed of 5 m/s when it suddenly accelerates, at a constant rate of 0.6 m/s^2, for a time of 10s .

givi [52]

Answer:

11m/s

Explanation:

$v = v0 + a \times t$

where...

v is current velocity

v0 is starting velocity

a is constant acceleration

and t is time accelerating

plugging in given values gives us

v = 5+.6*10 = 5+6 = 11

therefore the velocity at the end of 10 seconds is 11m/s

4 0

3 years ago