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
nadya68 [22]
2 years ago
10

Two runners start a race. After 2 seconds, they both have the same velocity. If they both started at the same time, how do their

average accelerations compare?
Physics
2 answers:
djyliett [7]2 years ago
7 0

let each runner starts from rest

v₀ = initial velocity of each runner = 0 m/s

t = time of travel = 2 sec =

a = average acceleration

average acceleration is given as

a = (v - v₀)/t

inserting the values

a =  (v - 0)/t

a = v/t

since each runner gains equal amount of speed in given time interval of "t". hence the average acceleration of each runner is same.

arsen [322]2 years ago
3 0

Answer:

Two runners start a race. After 2 seconds, they both have the same velocity.  they both started at the same time, how do their average velocities compare? They have the same acceleration rate.

Explanation:

You might be interested in
A ball is thrown vertically upward from the top of a building 112 feet tall with an initial velocity of 96 feet per second. The
nordsb [41]

Answer:

t=6.96s

Explanation:

From this exercise, our knowable variables are <u>hight and initial velocity </u>

v_{oy}=96ft/s

y_{o}=112ft

To find how much time does the <u>ball strike the ground</u>, we need to know that the final position of the ball is y=0ft

y=y_{o}+v_{oy}t+\frac{1}{2}gt^{2}

0=112ft+(96ft/s)t-\frac{1}{2}(32.2ft/s^{2})t^{2}

Solving for t using quadratic formula

t=\frac{-b±\sqrt{b^{2}-4ac } }{2a}

a=-\frac{1}{2} (32.2)\\b=96\\c=112

t=-0.999s or t=6.96s

<u><em>Since time can't be negative the answer is t=6.96s</em></u>

7 0
3 years ago
Eric drops a 2.20 kg water balloon that falls a distance of 45.08 m off the top of a
Marianna [84]

Answer:

972 J

Explanation:

At the bottom, all the gravitational potential energy was converted into kinetic energy. If you calculate the GPE, its value will be the same that the KE at the bottom. The GPE can be calculated this way:

GPE = mass×gravity×heigth

GPE = 2.2×9.8×45.08 ≈ 972

4 0
2 years ago
A weight trainer lifts a 90.0-kg barbell from a stand 0.90 m high and raises it to a height of 1.75 m. What is the increase in t
nirvana33 [79]

Answer:

∆PE = 749.7 J

At 0.9 m high, PE = 793.8 J

At 1.75 m high, PE = 1543.5 J

7 0
1 year ago
What is the difference between a measurement and an observation?A. Measurements are made with tools; observations are not.B. Obs
choli [55]

Answer:

A. Measurements are made with tools; observations are not

Explanation:

Measurement: <em>the assignment of numbers or codes according to prior-set rules. </em>

Observation: <em>data from an individual study subject or sampled unit.</em>

Measurement error: <em>differences between "true" answers and what appears on data collection instruments</em>

hope this helps

plz mark brainleist

8 0
3 years ago
8. What is the mass of a toy car with a speed of 12.5 m/s and 47500 J of kinetic energy?
Alla [95]

Answer:

608kg

Explanation:

Formula : <u>Kinetic</u><u> </u><u>energy</u><u> </u>

½ ×mass x speed²

<u>47500</u>

½×12.5²

=608 Kg

7 0
3 years ago
Other questions:
  • You have a string with a mass of 0.0133 kg. You stretch the string with a force of 8.89 N, giving it a length of 1.97 m. Then, y
    14·1 answer
  • Hey plz help me<br>suggest a situations where you might need to use ear defenders
    7·1 answer
  • An AC voltage source of amplitude 10V is supplied across an inductor and a resistor wired in series. The voltage amplitude acros
    12·1 answer
  • When a surfer rides an ocean wave on her surfboard, she is actually riding on. A. a crest that is toppling over. . B. a trough o
    6·2 answers
  • If the angle of incidence is 30°, what is the value of the
    15·2 answers
  • Indicate the result of each of the following unit vector cross products (unit vector hat-symbols not shown): . kxi = . jxi= -jxk
    8·1 answer
  • Place the atomic models in order of their atomic discoveries.
    15·1 answer
  • Energy transformation in wound spring of a toy car?<br>give your own answrr​
    11·2 answers
  • What is the smallest possible wavelength of light?
    6·1 answer
  • Mass m moves to the right with speed =v along a frictionless horizontal surface and crashes into an equal mass m initially at re
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!