1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Margarita [4]
2 years ago
5

Plz hep me tell ans of this only​

Physics
1 answer:
Stolb23 [73]2 years ago
4 0

We have no idea what force the object might exert until it hits something.

In order to accelerate 70 kg at the rate of 20 m/s^2, YOU or some machine has to PUSH it with a force of (F=m•a) 1,400 Newtons. If you stop pushing it, it stops accelerating.

You might be interested in
Leah is moving in a spaceship at a constant velocity away from a group of stars. Which one of the following statements indicates
OLEGan [10]

Answer:

E) She can perform no measurement to determine this quantity.

Explanation:

A spacecraft is a machine used to fly in outer space.

According to Isaac Newton's third law of motion, every action produces an equal and opposite reaction. When fuel is shoot out of one end of the rocket, the rocket moves forward for which no air is required.

As Leah is moving in a spaceship at a constant velocity away from a group of stars, she cannot measure to determine this quantity.

5 0
3 years ago
If an object's mass increases, its--
aev [14]

Answer:

both kinetic and potential energy

Explanation:

this is your ans

I hope it helps mate

I will always help you understanding your assingments

have a great day

#Captainpower :)

8 0
2 years ago
Which property of sugar makes it different from white crystalline sand?
yaroslaw [1]

Answer:

The property of sugar which makes it different from sand is that sugar can dissolve in water. Explanation: however the power of dissolving of sand is not present. This is due to the presence of interaction between sugar and water.

Explanation:

I hope that was useful

5 0
3 years ago
The current theory of the structure of the
IRISSAK [1]

1) The mass of the continent is 3.3\cdot 10^{21} kg

2) The kinetic energy of the continent is 624 J

3) The speed of the jogger must be 4 m/s

Explanation:

1)

We start by finding the volume of the continent. We have:

L = 5850 km = 5.85\cdot 10^6 m is the side

t = 35 km = 3.5\cdot 10^4 m is the depth

So the volume is

V=L^2 t = (5.85\cdot 10^6)^2 (3.5\cdot 10^4)=1.20\cdot 10^{18} m^3

We also know that its density is

d=2750 kg/m^3

Therefore, we can find the mass by multiplying volume by density:

m=dV=(2750)(1.20\cdot 10^{18})=3.3\cdot 10^{21} kg

2)

The kinetic energy of the continent is given by:

K=\frac{1}{2}mv^2

where

m=3.3\cdot 10^{21} kg is its mass

v = 3.2 cm/year is the speed

We have to convert the speed into m/s. We have:

3.2 cm = 0.032 m

1 year = 1(365)(24)(60)(60)=3.15\cdot 10^7 s

So, the speed is:

v=\frac{0.032 m}{3.15 \cdot 10^7 s}=1.02\cdot 10^{-9} m/s

So, we can now find the kinetic energy:

K=\frac{1}{2}(1.20\cdot 10^{21})(1.02\cdot 10^{-9})^2=624 J

3)

Here we have a jogger of mass

m = 78 kg

And the jogger has the same kinetic energy of the continent, so

K = 624 J

The kinetic energy of the jogger is given by

K=\frac{1}{2}mv^2

where v is the speed of the jogger.

Solving for v, we find the speed that the jogger must have:

v=\sqrt{\frac{2K}{m}}=\sqrt{\frac{2(624)}{78}}=4 m/s

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

3 0
3 years ago
Can Volcanoes create new landforms such as mountains
Rom4ik [11]
Yes,when they erupt witch leaves it unactive with makes it mountin
5 0
3 years ago
Other questions:
  • Describe 4 common workplace practices that are risk factors for injury
    14·1 answer
  • An airplane flies with a constant speed of 780 miles per hour. How far can it travel in 4 hours?
    9·2 answers
  • Which device in a car helps to protect riders from the effects of inertia in the event of an acident
    8·2 answers
  • Two speakers create identical
    6·1 answer
  • A student studies how an objects mass and speed are related to its kinetic energy. The table shows the results for one part of t
    15·1 answer
  • You perform an experiment to measure the speed of a car over time. The results are shown in the graph below. What is the best in
    12·2 answers
  • How does mass effect my room?
    13·1 answer
  • Starting from rest, a car travels 18 meters as it accelerates uniformly for 3.0 seconds. What is the magnitude of
    12·1 answer
  • Suppose a standing wave created on a spring that is 10.5 m long has a speed of 14 m/s and a frequency of 2 Hz. How many nodes an
    9·1 answer
  • The force shown in the figure(Figure 1) moves an object from x = 0 to x = 0.75 m.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!