Which part of the electromagnetic spectrum has the longest wave lengths

A wooden block is let go from a height of 5.80 m. What is the velocity of the block just before it hits the ground?

Shalnov [3]

Given :

A wooden block is let go from a height of 5.80 m.

To Find :

The velocity of the block just before it hits the ground.

Solution :

We know, by equation of motion :

$v^2 - u^2 = 2as$

Here, a = g = 9.8 m/s²( Acceleration due to gravity )

Putting all given values in above equation, we get :

$v^2 - u^2 = 2as\\\\v^2 -0 = 2\times 9.8 \times 5.8 \\\\v = \sqrt{2\times 9.8 \times 5.8 } \ m/s\\\\v = 10.66\ m/s$

Hence, this is the required solution.

3 0

3 years ago

male lions and human sprinters can both accelerate at about 10.0 m/s2. if a typical lion weighs 170 kg and a typical sprinter we

Rasek [7]

The difference in the force exerted by the ground during a race between these two species is 259.25

<h3>What is force?</h3>

Forces are influences that can change the movement of an object. A force can change the velocity of an object with mass, i.e. accelerate it. Forces can also be described intuitively by pushing or pulling. A force has both magnitude and direction and is a vector quantity.

Force exerted by the lion:

Normal force = mg

170 = m × 9.8

m = 17.34 kg

Forward force = ma

= 17.34 × 10.0

= 173.4 N

Total force = Normal force + Forward force

Total force = 170 + 173.4

= 343.4 N

Force exerted by the man:

Normal force = mg

75 = m × 9.8

m = 7.65 kg

Forward force = ma

= 7.65 × 10.0

= 76.5 N

Total force = Normal force + Forward force

Total force = 7.65 + 76.5

= 84.15 N

The difference in the forces exerted by these species is:

343.4 N - 76.5 N = 259.25 N

To know more about force visit:

brainly.com/question/19734564

#SPJ4

3 0

1 year ago

The diagram shows a positive charge moving in a magnetic field. a field of circles labeled b. there is a positively charged part

lesya692 [45]

The magnetic force will be point upwards in perpendicular direction to the field.

<h3>What is the direction of magnetic force?</h3>

The direction of the magnetic force on negative charge occurs in the opposite direction while it is directed to the positive charge direction.

From the given image and description, the positively charged particle with a velocity vector, v is pointing left, thus we can conclude that the magnetic force will be point upwards in perpendicular direction to the field.

Learn more about magnetic force here: brainly.com/question/12488283

#SPJ4

4 0

2 years ago

A pendulum has a period of 1.69 s on earth. what is its period on mars, where the acceleration of gravity is about 0.37 that on

love history [14]

The formula for the period of the pendulum is
$T=2 \pi \sqrt{ \frac{L}{g} }=$
where L is the pendulum's length and g the gravitational acceleration.

Labeling with E the Earth and with M Mars, we can write the period of the pendulum on Earth as
$T_E = 2 \pi \sqrt{ \frac{L}{g_E} }$
and the period of the pendulum on Mars as
$T_M = 2 \pi \sqrt{ \frac{L}{g_M} }$

if we calculate the ratio, we get
$\frac{T_M}{T_E}= \sqrt{ \frac{g_E}{g_M} }$
but we know that the gravitational acceleration on Mars is 0.37 times the gravitational acceleration on Earth:
$g_M = 0.37 g_E$
Substituting into the formula, we find
$\frac{T_M}{T_E}= \sqrt{ \frac{1}{0.37} }=1.64$
And so, the period of the pendulum on Mars is
$T_M = 1.64 T_E = 1.64 (1.67 s)=2.78 s$

8 0

3 years ago

Read 2 more answers

The fluid pressure 10 ft underwater is _____ the fluid pressure 5 ft underwater. A.less than or greater than, depending on what

just olya [345]

<span>I would say greater than because as you do deeper, the pressure strengthens. If you were in a 10 ft deep pool and you dive all the way to the bottom, the ears usually pop. That's because of the pressure. Whereas if you were to go five feet, your ears wouldn't. It depends on the age of the person. Hope this helps.</span>

5 0

4 years ago