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
Leviafan [203]
3 years ago
10

Help with #3 please

Physics
1 answer:
Marizza181 [45]3 years ago
4 0

Answer:

The answer to your question is va = 8 cm/s, vb = 12.5 cm/s, a = 9 cm/s²

Explanation:

Data

Ta = 0.125 s

Tb = 0.08 s

Δtab = 0.5 s

distance = 1 cm

Process

1.- Calculate va

va = 1/0.125 = 8 cm/s

vb = 1/0.08 = 12.5 cm/s

2.- Calculate Δv

Δv = 12.5 - 8

Δv = 4.5 cm/s

3.- Calculate acceleration

a = Δv / Δt

a = 4.5/0.5

a = 9 cm/s²

You might be interested in
If a spring stores 5 j of energy when its compressed by 0.5 m. what is the spring constant
aliya0001 [1]

The elastic potential energy stored in a spring is given by:

E=\frac{1}{2}kx^2

where k is the spring constant, and x=0.5 is the compression of the spring. Re-arranging the formula and using E=5 J, we find the spring constant:

k=\frac{2E}{x^2}=\frac{2(5 J)}{(0.5 m)^2}=40 N/m

3 0
3 years ago
Read 2 more answers
Can a runner on a track be accelerating even if she is running at a constant speed why or why not
Lynna [10]
If the runner is running in a circular track then yes when something or someone is moving in a circular motion at a constant speed they are indeed accelerating. They’re accelerating because the direction of the velocity vector is changing
6 0
4 years ago
if mass of an object is decreased to half and acting force is reduced by quarter the acceleration of its motion​
11111nata11111 [884]

Answer:

See explanations below

Explanation:

According to Newtons second law of motion

F = mass * acceleration

F = ma

If mass of an object is decreased to half, then m₂ = 1/2 m

If acting force is reduced by quarter, then F₂ = 3/4 F

F₂ = m₂a₂

3/4F = 1/2m a₂

Divide both expressions

(3/4F)/F = (1/2m)a₂/ma

3/4 = 1/2a₂/a

3/4 = a₂/2a

4a₂ = 6a

2a₂ = 3a

a₂ = 3/2 a

Hence the acceleration of its motion will be one and a half of its original acceleration.

8 0
3 years ago
Which of the following must be true about an object for it to be in uniform circular motion? A.It must have zero centripetal acc
Grace [21]

In the previous section, we defined circular motion. The simplest case of circular motion is uniform circular motion, where an object travels a circular path at a constant speed. Note that, unlike speed, the linear velocity of an object in circular motion is constantly changing because it is always changing direction. We know from kinematics that acceleration is a change in velocity, either in magnitude or in direction or both. Therefore, an object undergoing uniform circular motion is always accelerating, even though the magnitude of its velocity is constant.






                                        hope it helps

5 0
3 years ago
Read 2 more answers
10.What is the Kinetic Energy of a 150 kg object that is moving with a speed<br> of 15 m/s? (7b)
madam [21]
KE=1/2 mv^2
=1/2(150kg)(15m/s)^2
=16875 kgms^-2
4 0
4 years ago
Other questions:
  • A cylindrical rod with length (1.7 m) and radius (2 cm) is fixed from one end and a mass of (20 kg) is attached to the other fre
    5·1 answer
  • A 80 kg firefighter climbs of stairs 6 meter high in ten seconds
    7·1 answer
  • Plz answer this asap first answer gets brainliest and 100 points
    5·2 answers
  • Which is not an appearance of a solution?
    12·1 answer
  • The blue laser in a blue ray DVD player is 405nm laser in vacuum. The aser strikes a quartz crystal with index of refraction 1.4
    9·1 answer
  • What does ROCAPV mean? It says related to electricity.
    5·1 answer
  • Jill uses a magnet to pick up a nail. Then, she touches the nail to a paper clip and picks up the paper clip. What will most lik
    14·2 answers
  • An object is launched with an initial speed of 30 m/s at an angle of 60° above the horizontal . What is the maximum height reach
    7·1 answer
  • Giải giúp em bài này với ạ?
    5·1 answer
  • The equipotential surfaces associated with a point charge are
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!