2 years ago

I really need a hand here!

2 answers:

4 0

Answer:

There is more to motion than distance and displacement. ... When you describe an object's speed, you often describe the average ... Velocity describes the speed and direction of an object.

Explanation:

Lemur [1.5K]2 years ago

3 0

Velocity is fun so it should be your answer

You might be interested in

A wooden block has a mass of 20.0 kg and a specific heat of 1700 J/kg °C. Find the change in thermal energy of the block as it w

andrew-mc [135]

M = 20.0kg, the mass of the block.
c = 1700 J/(kg-°C), the specific heat
ΔT = 25 - 15 = 10 °C = 10 K, the change in temperature.

The change in thermal energy is
$Q = (20.0 \, kg)*(1700 \, \frac{J}{kg-C} )*(10 \, C) = 340 \times 10^{3} \, J$

Answer: 340 kJ (or 340,000 J)

6 0

2 years ago

a man of mass 50 kg climbs up stairs each of height 0.2 m in 20 seconds .calculate the power of the man

Delicious77 [7]

How many stairs?
You can use this to find the work
U
W=mgh
And the power by
P=W/T

4 0

3 years ago

What is the magnitude of the force acting on a spring with a spring constant of 275 N/m that is stretched 14.3 cm?

Travka [436]

15 i thank
if u need more help just ask me

8 0

3 years ago

I don’t get this question and i need help!!!

galina1969 [7]

i would say number 2

3 0

3 years ago

With what speed must you approach a source of sound to observe a 25% change in frequency?

insens350 [35]

Sound source is at rest, you are moving with velocity v, f = frequency, c = speed of sound:

f = f0(1 + v/c)

115 = 100(1 + v/343)
115 = 100 + 100v/343
15 = 100v/343
v = 15*343/100
<span> v = 51,45 m/s </span>

5 0

2 years ago