3 years ago

What causes object to speed up,slow down, and change directions

Physics

2 answers:

mestny [16]3 years ago

8 0

Answer:

inertia and or inertial interference

Nataly_w [17]3 years ago

5 0

Answer:

gravity

Explanation:

it helps humans and animals to not float away

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Which two formulas are used to calculate potential and kinetic energy?

Marina86 [1]

Answer:

P.E = mgh

K.E = 1/2mv²

Explanation:

P.E = mgh

That is m= mass in kilograms, g=acceleration due to gravity and h= height in meters.

K.E = 1/2mv²

That is 1/2 of an object's mass multiplied by the velocity squared.

8 0

4 years ago

In a laboratory, you determine that the density of a certain solid is 5.23×10−6kg/mm3. Convert this density into kilograms per c

kiruha [24]

Answer:

$5.23\cdot 10^3 kg/m^3$

Explanation:

The density of the solid is

$d = 5.23\cdot 10^{-6}kg/mm^3$

we want to convert it into kg/m^3. We must note that:

$1 m^3 = 1 m \cdot 1 m \cdot \1m =1000 mm\cdot 1000 mm \cdot 1000 mm=1\cdot 10^9 mm^3$

Therefore, the conversion can be done as follows:

$d=5.23\cdot 10^{-6} \frac{kg}{mm^3} \cdot (1\cdot 10^9 \frac{mm^3}{m^3}) =5.23\cdot 10^3 kg/m^3$

8 0

3 years ago

Compare the momentums of a 50 kg dolphin swimming at 16.4 m/s and a 4100 kg elephant walking 0.20 m/s?

Mamont248 [21]

Their momentum is the same.
momentum of dolphin=50kg*16.4m/s=820kg*m/s
momentum of elephant=4100kg*0.20m/s=820kg*m/s

6 0

3 years ago

Read 2 more answers

A city planner needs to verify that Main Street and Oak Street are parallel. If ___________ are supplementary, the streets must

Alinara [238K]

The answer is a trust me i did it on usa test prep.

5 0

4 years ago

Read 2 more answers

Two particles move along an x axis. The position of particle 1 is given by x ! 6.00t 2 # 3.00t # 2.00 (in meters and seconds); t

s344n2d4d5 [400]

Answer:

15.6m/s

Explanation:

V1= $\frac{dx}{dt}=\frac{d}{dt}(6t^{2}+3t+2)$ because the derivate of the position is the velocity

V1=12t+3

V2=20+ $\int\limits^_ {} \,$ -8t because the integral of the acceleration is the velocity

V2= $20-4t^{2}$

V1=V2 to see when the velocities of particles match

12t+3=20-4t^2

4t^2+12t-17=0 we resolve this with $\frac{-b+-(\sqrt{b^{2} -4ac} )}{2a}$

and we take the positif root

t=1.05 sec

if we evaluate the velocity (V1 or V2) the result is 15.6m/s

7 0

3 years ago