Physics, 23.11.2022 08:55 sherelyn0013

3/ 7x-3 (5x+2) = 4
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Answer from: Quest

Good Day

Problem:

A batang pinoy athlete from your school thrown a javelin,always at the same speed,at four different angles (30°,40°,60° and 80°) above the horizontal.Which two throws cause the javelin to land the same distance?

Angle 30° and 60° will have the same range when both of them are thrown with the same velocity.

Example:

If the initial velocity is 10 m/s and gravity is 9.8 m/s²

Angle 30° will have a range of 8.84 meters

Angle 60° will also have a range of 8.84 meters

Hope it helps...=)

Answer from: Quest

Centripetal force is the force that will pull the body moving in a circular path towards the center. Centrifugal force, on the other hand, is the force that pulls the body away from the center. To calculate the centripetal force acting on a certain body, the following equation must be used:

$F_c = \frac{Wv^2}{gr}$ (Eqn 1)

Where:

W = weight of body

v = tangential velocity

r = radius of curvature

g = gravitational acceleration (9.81 m/s^2 )

Since the weight of the car and the radius of curvature are not given, we can assume that these are constant.

Thus we can assign W/r = k.

Substituting to the main equation,

$F_c = \frac{kv^2}{g}$ (Eqn 2)

Thus we can calculate k using the given initial Fc and velocity, but first, convert the velocity to m/s.

$v= 30\frac{km}{h} * \frac{1000m}{1 km} * \frac{1h}{3600s} = 8.33 m/s$

Then using Eqn 2,

$2000 N = \frac{k(8.33 m/s)^2}{9.81 m/s^2}\\k = 282.75 N/m$

Using this k and the new velocity, we can calculate the new centripetal force,

$F_c = \frac{282.75 N/m(2*8.33 m/s)^2}{9.81 m/s^2}\\F_c = 7999.88 N$

Thus, the new centripetal force is roughly 8000 N. That only means that doubling the speed of the car quadruples the centripetal force being exerted.

For more information regarding centripetal and centrifugal force, you may visit the following links:

Answer from: Quest

Procedure to follow to study magnetic field by using the following objects:Iron nail is coiled with wire and attached to the battery.If the temporary magnet is moved in an iron nail, it is called electromagnet.Remember that when a magnetic material is brought near the bar magnet and it got attracted toward the magnet. Remember if it is a non-magnetic material it will be not attracted.A bar magnet is a permanent magnet.Iron nail will function as a temporary magnet.Magnetic field can be studied by matching magnetic fields processed by the permanent magnet (bar magnet) and temporary magnet (electromagnet).

To know and get more reliable answers about magnetic field kindly visit the links below:

Answer from: Quest

I believe that God made everything because if you are a catholic, it is stated in the bible. If you don"t believe, then you have less faith to God. It is stated in the bible that God created the whole world in 7 days including the first persons in the bible, Adam and Eve.

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