That's true.

Netwon's second law states that the resultant of the forces F acting on a body is equal to the product between its mass m and its acceleration a:
$\sum F = ma$
This means that if the net force acting on an object is different from zero (term on the left), than the acceleration of the object (term on the right) must be different from zero as well, and therefore the body is accelerating.

In particular, both F and a in the equation are vectors: this means that if the acceleration is positive, F and a have the same direction. In this problem, the acceleration is positive (because the object is speeding up), therefore the force and the acceleration have same direction.

7 0

3 years ago

A crane lifts an l-bean to a height of 30 meters giving it a potential energy of 108,486). What is the mass of the I-beam?

andrew-mc [135]

369 kg

Explanation:

Step 1:

We know that the expression for potential energy is

PE = mgh

where, m =Mass

g = Acceleration due to gravity

h Height

Step 2:

Here m = ?

PE = 108486

h = 30 m

g = 9.8 ms⁻²

108486 = $30 * 9.86 * m$

$m= 108486 / (9.8*30) = 369 kg$

5 0

2 years ago

Compare and contrast tornadoes and hurricanes

Savatey [412]

The similarity between tornadoes and hurricanes is they both contain strong rotating winds that can cause damage. The parent storm clouds are much larger for a hurricane than a tornado, a tornadoes "life" is a lot shorter than a hurricane, etc.

8 0

3 years ago

Nitrogen is used in many plant fertilizers. When it rains, the excess fertilizers run off into streams, rivers, and eventually a

allsm [11]

C. Farmers and gardeners should use other methods..........

3 0

2 years ago

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