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
goldfiish [28.3K]
4 years ago
10

a skater increases her speed uniformly from 2.0 m/s to 10 m/s in 3.0s. what is the acceleratioon of the biker?

Physics
1 answer:
sergey [27]4 years ago
5 0

Answer:

a= 2.667 m/s²

Explanation:

Given that

Initial velocity ,u= 2 m/s

Final velocity ,v= 10 m/s

Time taken ,t= 3 s

As we know that

v =  u +  at

a=Acceleration ,u=Initial velocity ,v= Final velocity ,t=time

Now by putting the values in the above equation

v =  u +  at

10 = 2 + a x 3

8 = 3 a

a=\dfrac{8}{3}\ m/s^2

a= 2.667 m/s²

Therefore the acceleration of the biker will be 2.667 m/s²

You might be interested in
How does the kinetic energy of an object relate to its mass and velocity?
Setler [38]

The kinetic energy of an object is directly proportional to its mass, and to the square of its velocity.

5 0
3 years ago
Tom Sawyer runs 10 m/s down the dock and leaps on to his floating raft already moving 1.5 m/s away from shore. If Tom weighs 70
KatRina [158]

Answer:

Not the right answer in the options, speed is 4.47 m/s, and the procedure is coherent with option A

Explanation:

Answer A uses mass and velocity units, which are momentum units. By using the conservation of momentum:

.p_{initial} =p_{final} \\m_{Tom}*v_{Tom}+m_{raft}*v_{raft}=(m_{Tom}+m_{raft})*v_{both} \\70*10+130*1.5 kg*m/s=895kg*m/s\\v_{both}=\frac{895 kg*m/s}{200 kg} =4.47 m/s

Since Tom stays in the raft, then both are moving with the same speed. From the options, the momentum is in agreement with option A, however, the question asks for speed.

3 0
3 years ago
A cylindrical Nickel rod (9 mm diameter, 50 m long) is pulled in tension with a load of 6,283 N. What would the elongation of th
Norma-Jean [14]

Answer:

0.29 m

Explanation:

9 mm = 0.009 m in diameter

Cross-sectional area A = \pi d^2/4 = \pi * 0.009^2/4 = 6.36\times 10^{-5} m^2

Let the tensile modulus of Nickel E = 170 \times 10^9Pa.

The elongation of the rod can be calculated using the following formula:

\Delta L = \frac{F L}{A E} = \frac{6283*50}{6.36\times 10^{-5} * 170 \times 10^9} = \frac{314150}{1081200} = 0.29 m

6 0
4 years ago
The parallel axis theorem relates Icm, the moment of inertia of an object about an axis passing through its center of mass, to I
nexus9112 [7]

Answer:

esfdfefsdfe

Explanation:

fsfefsdf

8 0
3 years ago
Read 2 more answers
A box with the mass of 20 kg at 5 m is lifted to 20 m. How much work was 7 points<br> done?
kirza4 [7]

Answer:

2,900\: \mathrm{J}

Explanation:

Work is given by the equation W=F\Delta x where F is force and \Delta x is displacement.

Displacement is defined as change in position. In this case, the box moves from 5m to 20m. Its displacement is 20-5=15\:\mathrm{m}.

The force acting on the box is the force of gravity, given as F_g=mg.

Therefore, the total work done is:

W=F\Delta x=mg\Delta x = 20\cdot 9.81\cdot 15=2,943=\fbox{$2,900\:\mathrm{J}$}(two significant figures).

3 0
3 years ago
Other questions:
  • If a spring with a spring constant k = 10 n/m is stretched from its equilibrium position by 0.1 m , and released, what would be
    10·1 answer
  • Please help me with 15,14qqqq
    5·1 answer
  • An object traveling around another object in space is in
    14·1 answer
  • Calculate the kinetic energy in joules of a 1500 kg automobile moving at 17 m/s . express your answer to two significant figures
    9·1 answer
  • A pendulum has 760 J of potential energy at its highest point of it swing how much Kinetic Energy will it have at the bottom of
    14·1 answer
  • Explain how the theory of the Sun’s dynamo results in an average 22-year solar activity cycle. Include the location and mechanis
    7·1 answer
  • After most of the iron in the ocean was trapped in banded iron formations, ________ began dispersing into the atmosphere.
    5·2 answers
  • The time separating high tides is 12 hours and 25 minutes. A high tide occurs at 3:10 p.m. The next low tides occur at 9:30 AM a
    6·1 answer
  • A 30 kg mass and a 20 kg mass are joined by a light rigid rod and this system is free to rotate in the plane of the page about a
    6·2 answers
  • given the data 11.4, 11.3, 11.2 and 11.1 cm determine the average and its standard deviation using equation
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!