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
Wewaii [24]
2 years ago
8

A person is trying to ride a bike all the way round the inside of a pipe for a stunt in a film. The filmmaker wants to know what

speeds are involved. The pipe has a diameter of 8 m. The mass of the bike and rider is 400 kg. The rider goes at a constant speed of 5 m/s.
a) What is its acceleration at the bottom?
b) What is the force on the bike at an angle of 30° up from the bottom?
c) What is the minimum velocity at the top for the bike and rider to stay moving in a circle?
d) Do the bike and rider have sufficient velocity to stay movins a on a circle at the top?
​
Physics
1 answer:
nirvana33 [79]2 years ago
4 0

Answer:

1) The acceleration will be g = 9.8 m/s²

2) F = Wsinα = mgsinα = 400kg·9.8m/s²·1/2 = 2000N

You might be interested in
What happened as the mass of the sun increased during formation of the solor system
sveta [45]

Answer:

Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. ... When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material. At the center, gravity pulled more and more material in.

Explanation:

3 0
3 years ago
What is work done aganist gravity?​
Rudik [331]

Answer:

Work done against gravity in lifting an object becomes potential energy of the object-Earth system. The change in gravitational potential energy, ΔPEg, is ΔPEg = mgh, with h being the increase in height and g the acceleration due to gravity.

Explanation:

You're Welcome.

8 0
3 years ago
Read 2 more answers
Lexi is balancing equations. She is finding one equation to be very difficult to balance. Which explains how to balance the equa
Rina8888 [55]

Answer: ZnSO4 + Li2CO3 = ZnCO3 + Li2SO4 - Chemical Equation Balancer

Equation is already balanced.

Explanation: ZnSO4 + Li2CO3 = ZnCO3 + Li2SO4

6 0
2 years ago
A cat, walking along the window ledge of a new york apartment, knocks off a flower pot, which falls to the street 280 feet below
Harlamova29_29 [7]
H = 280 ft, the height of the flower pot.
g = 32 ft/s²

Neglect air resistance.
Note that 1 ft/s = 15/22 mi/h

The initial vertical velocity is zero.
Let v =  the velocity with which the flower pot hits the ground.
Then
v² = 2gh
    = 2*(32 ft/s²)*(280 ft)
    = 17920 (ft/s)²
v = 133.866 ft/s

Also,
v = (133.866 ft/s)*(15/22 (mi/h)/(ft/s)) = 91.272 mi/h

Answer:  133.9 ft/s or 91.3 mi/h

5 0
3 years ago
If you weigh 690 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun an
lana [24]

Answer:

Explanation:

Given that,

Mass of star M(star) = 1.99×10^30kg

Gravitational constant G

G = 6.67×10^−11 N⋅m²/kg²

Diameter d = 25km

d = 25,000m

R = d/2 = 25,000/2

R = 12,500m

Weight w = 690N

Then, the person mass which is constant can be determined using

W =mg

m = W/g

m = 690/9.81

m = 70.34kg

The acceleration due to gravity on the surface of the neutron star is can be determined using

g(star) = GM(star)/R²

g(star) = 6.67×10^-11 × 1.99×10^30 / 12500²

g (star) = 8.49 × 10¹¹ m/s²

Then, the person weight on neutron star is

W = mg

Mass is constant, m = 70.34kg

W = 70.34 × 8.49 × 10¹¹

W = 5.98 × 10¹³ N

The weight of the person on neutron star is 5.98 × 10¹³ N

5 0
3 years ago
Other questions:
  • An electron moving in the direction of the +x-axis enters a magnetic field. If the electron experiences a magnetic deflection in
    15·1 answer
  • A charge Q is transferred from an initially uncharged plastic ball to an identical ball 17 cm away. The force of attraction is t
    7·1 answer
  • What if a wave reaches a type of
    7·2 answers
  • Examples were friction is not useful
    11·1 answer
  • (3 points) A disk is spinning freely with angular speed 6.0 rad/s when a second identical disk, initially not spinning, is dropp
    12·1 answer
  • How is momentum conserved is a Newton's cradle when one steel ball hits the other
    7·1 answer
  • How do you draw an ear
    6·1 answer
  • What are the layers of the Earth's atmosphere?
    13·2 answers
  • The lift took 5 seconds to arrive at the second floor. What was the power of lift?
    15·2 answers
  • this problem occurs in petroleum firefighting when fire streams are applied to the burning liquid surface at such an angle that
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!