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
alexdok [17]
3 years ago
6

Suppose a runner completes one lap around a 400-m track in a time of 50 s. Calculate the average speed of the runner.

Physics
1 answer:
suter [353]3 years ago
6 0

Answer:

8m/s

Explanation:

Average Speed = distance / time = 400/50 = 8m/s

You might be interested in
A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from zero to 5.27 m
jeyben [28]

Answer:

See explanation

Explanation:

From Newton's law; the rate of change of momentum is proportional to the impressed force. Hence;

F.t = mv- mu

F= force

t= time

m= mass

V= final velocity

u = initial velocity

since u = 0, mv= 0

F= MV/t

F= 69.8 × 5.27/0.833

F= 442 N

Impulse = Ft= 442 × 0.833= 368 Ns

5 0
3 years ago
a 0.5 kilogram soccer ball is kicked with a force of 50 newtons for 0.2 sec the ball was at rest before the kick ehat is the spe
chubhunter [2.5K]
The speed will be 20 m/s, you are welcome

8 0
3 years ago
Suppose you are playing hockey on a new-age ice surface for which there is no friction between the ice and the hockey puck. You
BlackZzzverrR [31]

Answer:

<em>Not slow down or speed up</em>.

Explanation:

Hitting the puck accelerates the speed of the puck from zero to the speed with which it leaves at the instance they lose contact. Since there is no friction between the puck and the ice, there will be no force decelerating or accelerating the hockey puck, allowing the puck to move away and remain in motion without speeding up or slowing down indefinitely theoretically.

4 0
3 years ago
Why do you think the temperature does not change much during a phase change?
11111nata11111 [884]

Answer:

It depends on where the temperature is dropping, in which body so to speak. Generally, the temperature adapts to the two bodies, for example if a hot piece of metal meets a cold one, the two will continue until they are at an equal temperature, an intermediate temperature.

3 0
2 years ago
Read 2 more answers
Melting butter is a physical change. Which best describes what is happening?
kati45 [8]

Answer:

Option B

Explanation:

The butter forms a new arrangement of atoms i.e from solid to liquid

3 0
3 years ago
Other questions:
  • A stack of books rests on a level frictionless surface. A force F acts on the stack, and it accelerates at 3.0 m/s2. A 1.0 kg bo
    14·1 answer
  • Which statements are false? Money comes in different forms. Money is indivisible. M1 includes notes, coins, and funds in checkab
    11·2 answers
  • Which statement best describes the explanatory powers of hypotheses and theories?
    6·2 answers
  • What is the momentum of a dog of mass 14 kg that is running east with a
    12·1 answer
  • When a physical change occurs, the mass of the substance is conserved. This means that the total mass of the substance remains t
    5·1 answer
  • A particle moves according to the law of motion s(t) = t^{3}-8t^{2}+2t, t\ge 0, where t is measured in seconds and s in feet. a.
    12·1 answer
  • The only force acting on a 3.4 kg canister that is moving in an xy plane has a magnitude of 3.0 N. The canister initially has a
    8·1 answer
  • Can anybody help me?
    10·1 answer
  • What is the chemical formula for magnesium sulfide?
    12·1 answer
  • Which letter explains why no machine is 100 percent efficient.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!