View the chart on the characteristics of electromagnetic and mechanical waves and answer the question.

What is the force on a body of mass 20 kg moving with an acceleration of 3 m/s2 ?

zubka84 [21]

Hey!!

Solution,

Mass(m)=20kg

Acceleration due to gravity(g)=3 m/s^2

Force=?

Now,

Force=m*g

 = 20*3

 = 60 Newton

The force is 60 Newton 

Hope it helps

Good luck on your assignment..

5 0

3 years ago

Read 2 more answers

A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits t

RUDIKE [14]

Complete Question:

A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will

A. be behind the package.

B. be over the package.

C. be in front of the package.

D. depend on the speed of the plane when the package was released.

Answer:

B.

Explanation:

As no other horizontal forces are present, due to the horizontal movement and the vertical one are independent each other (as they are perpendicular), the plane and the package continue moving horizontally at the same speed, so when the package hits the ground (due to the action of gravity in the vertical direction only) the plane will be exactly over the package.

7 0

3 years ago

How do you the average speed

svet-max [94.6K]

Speedavg = distance/time

3 0

3 years ago

The reason an astronaut in an earth satellite feels weightless is thatThe reason an astronaut in an earth satellite feels weight

ozzi

The reason an astronaut in an earth satellite feels weightless is that the astronaut is falling.

Option a

Explanation: 

The other options except Option is not applicable since the gravitational force is a long range force, in which the satellite revolves very close to the surface of the Earth where the gravity is felt.The zero weight experienced by the astronaut in a satellite is due to the earth pulling along with satellite. Due to gravitational force of the Earth,the astronaut falls freely .

But why not the satellite comes down due to gravity when its launched in space. The fact is that the satellite is launched with velocity of tangent direction and it is very high. The centripetal force balances the gravity.

8 0

3 years ago

Read 2 more answers

Two objects of the same mass move along the same line in opposite directions. The first mass is moving with speed . The objects

Alexandra [31]

Explanation:

Let the mass of two objects be m. Both objects move along the same line in opposite directions. Let v and u₂ are speeds of both objects before collision.

After the collision, both objects stick together and move with the speed of 0.1 V the direction of the velocity of the first mass before the collision.

Using the conservation of momentum as :

$m_1u_1+m_2u_2=(m_1+m_2)v$

$V=\dfrac{m_1u_1+m_2u_2}{(m_1+m_2)}$

$V=\dfrac{m(u_1+u_2)}{(m_1+m_2)}$

$0.1v=\dfrac{m(v+u_2)}{(2m)}$

On solving above equation, $u_2=-0.8v$

So, the speed of the second mass before the collision is 0.8 v. The negative sign shows that the it moves in opposite direction. Hence, this is the required solution.

6 0

3 years ago