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
andrew-mc [135]
3 years ago
9

In order to ride a bike up a hill with increasing speed—

Physics
1 answer:
sergey [27]3 years ago
5 0

Answer: the rider’s pedal force must be greater than friction and the force of gravity

Explanation:

This is because if the pedal force was less, you would go slower, and it is obviously not impossible to ride up a hill without increasing speed. But if the force was greater, your speed would increase.  

You might be interested in
How much potential energy does a 40-kg medicine ball gain when it is lifted 5 m? Use the formula: GPE= mass X gravity (9.8 m/s2)
Ronch [10]
The answer is c: <span>1960 J

</span>Potential Energy :
<span>PE = m x g x h = 40*9.8*5=1960
</span>
4 0
3 years ago
brick, dry soil, paper, and water. If all four substances were exposed to sunlight for the same amount of time, which substance
denis-greek [22]
Water because the light is able to enter the water and allow heat to enter faster.
4 0
3 years ago
When the Apollo 11 lunar module Eagle lands on the moon it comes to a stop 10m above the surface of the moon. The last 10m it fr
Scrat [10]

Answer:

i) 3.514 s, ii) 5.692 m/s

Explanation:

i) We can use Newton's second law of motion to find out how long does it take for the Eagle to touch down.

as the equation says for free-falling

h = ut +0.5gt^2

Here, h = 10 m, g = acceleration due to gravity = 1.62 m/s^2( on moon surface)

initial velocity u = 0

10 = 0.5×1.62t^2

t = 3.514 seconds

Therefore, it takes t = 3.514 seconds for the Eagle to touch down.

ii) use Newton's 1st equation of motion to calculate the velocity of the lunar module when it hits the surface of the moon

v = u + gt

v = 0+ 1.62×3.514

v= 5.692 m/s

7 0
3 years ago
What is likely to happen if you don't ventilate your boat after fueling?
weeeeeb [17]
If you don't ventilate your boat after fueling, the gas fumes will stay in the bottom of boat and this is very dangerous.
Explosion can happen if you don't ventilate your boat after fueling so to avoid any explosion or any problem, you have to follow the proper procedure for fueling the boat.
So always ventilate your boat after fueling. 
3 0
3 years ago
Read 2 more answers
A car speeds past you sounding its horn at a frequency of 1000Hz. The frequency you hear:
ki77a [65]

Answer:

f' =1064.1025 Hz

Explanation:

We know that from doppler's effect

f'=\frac{v+v_0}{v-v_s}f

f'= observed frequency

f= actual frequency =1000 Hz

v= velocity of sound waves = 332 m/s

v_o= velocity of observer =0

v_s= velocity of source. ( let velocity of car be 20 m/s)

therefore,

f'=\frac{332+0}{332-20}\times1000

f' =1064.1025 Hz

3 0
3 years ago
Other questions:
  • A single-turn circular loop of radius 6 cm is to produce a field at its center that will just cancel the earth's field of magnit
    12·1 answer
  • A string, stretched between two fixed posts, forms standing-wave resonances at 325 Hz and 390 Hz. What is the largest possible v
    9·1 answer
  • 23. Challenge: A gas is heated so that it expands from a volume of 1.0L to a volume of 1.5 l. If the
    13·1 answer
  • The magnitude of the momentum of an object is 64 kilogram meters per second. If the magnitude of te velocity is doubled, the mag
    11·1 answer
  • If a positively charged body is moved against an electric field it will gain?
    11·1 answer
  • When a person holds a ball above earth's surface, where is this potential energy stored?​
    7·1 answer
  • Please help me..........
    6·2 answers
  • 2 t of ferrous scrap at a temperature of 20 degrees is heated to the melting point and melted. How much to consume?
    14·1 answer
  • How can we find velocity?*
    14·1 answer
  • Khi phân cực thuận Diode có dòng điện chạy theo chiều
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!