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
elena-14-01-66 [18.8K]
3 years ago
12

A car accelerates from rest to a velocity of smeters second in 4 seconds What is average acceleration over this period of time

Physics
1 answer:
ipn [44]3 years ago
3 0

Answer:

acceleration=s/4

Explanation:

You might be interested in
A space walking astronaut has become detached from her spaceship.shes floating in space while holding a wrench she is thinking a
victus00 [196]

Answer:

Newton's third law of motion states that for every action, there is equal and opposite reaction.

While space walking, when the astronaut gets detached from the space ship, she floats in space holding a wrench. In order to get back to the spaceship, she should throw the wrench in the opposite direction of the spaceship. This action would  cause a reaction on her own body and she would be pushed away from the wrench and towards the spaceship. Thus, she can return back to the spaceship in this way.

4 0
3 years ago
A car travels 40km/hr for 2 hours and 55km/hr for 2 hours how far has the car traveled what’s its average velocity?
vfiekz [6]

Answer;

Average speed  = 47.5 km/hr

Explanation and solution;

Average Speed = Total distance /Total time

Total distance;

-In the first two hours travelling at 40km/hr, total distance traveled is 80km.

(40 × 2) = 80 km

-In next two hours distance covered is 110 km. (55 ×2)

Total distance = 110 + 80 = 190 km

Total time = 2 + 2 = 4 hours

Average Speed = Total distance /Total time

                          = 190/4

                         = 47.5 km/hr

7 0
3 years ago
Kinetic energy can be passed from one object to another when objects collide,
antiseptic1488 [7]
Kinetic energy can be passed from one object to another when objects collide,
Answer: True

Hope This Helps! :3
5 0
3 years ago
Read 2 more answers
What is Newton's 3rd Law of Motion? *
Alexandra [31]

Answer:

For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

Explanation:

Every force sent into an object will sent a force in return.

If you smack a table, you can feel the table "push back"

3 0
3 years ago
Read 2 more answers
Two balls undergo a perfectly elastic head-on collision, with one ball initially at rest. if the incoming ball has a speed of 20
melamori03 [73]
what is the final speed of the incoming ball if it is much more massive than the stationary ball? express your answer using two significant figures. v1 = 200 m / s submitprevious answers correct
 Perfectly elastic collisions means that both mechanical energy and
momentum are conserved.
 Therefore, for this case, we have the equation to find the final velocity of the incoming ball is given by
 v1f = ((m1-m2) / (m1 + m2)) v1i
 where,
 v1i: initial speed of ball 1.
 v1f: final speed of ball 1.
 m1: mass of the ball 1
 m2: mass of the ball 2
 Since the mass of the ball 1 is much larger than the mass of the ball 2 m1 >> m2, then rewriting the equation:
 v1f = ((m1) / (m1) v1i
 v1f = v1i
 v1f = 200 m / s
 answer
 200 m / s
 part b part complete what is the final direction of the incoming ball with respect to the initial direction if it is much more massive than the stationary ball? forward submitprevious answers correct

 Using the equation of part a, we can include in it the directions:
 v1fx = ((m1-m2) / (m1 + m2)) v1ix
 v1i: initial velocity of ball 1 in the direction of the x-axis
 v1f: final speed of ball 1 in the direction of the x-axis
 like m1 >> m2 then
 v1fx = v1ix
 v1fx = 200 m / s (positive x direction)
 So it is concluded that the ball 1 continues forward.
 answer:
 forward


 part c part complete what is the final speed of the stationary ball if the incoming ball is much more massive than the stationary ball ?.
 The shock is perfectly elastic. For this case, we have that the equation to find the final velocity of the stationary ball is given by
 v2f = ((2m1) / (m1 + m2)) v1i
 where,
 v1i: initial speed of ball 1.
 v2f: final speed of ball 2.
 m1: mass of the ball 1
 m2: mass of the ball 2
 Then, as we know that m1 >> m2 then
 v2f = ((2m1) / (m1) v1i
 v2f = 2 * v1i
 v2f = 2 * (200 m / s)
 v2f = 400 m / s
 answer
 400m / s
7 0
3 years ago
Read 2 more answers
Other questions:
  • What term in physical science is defined as a change in position
    11·1 answer
  • Compare the force of air resistance and the force of gravity on an object falling at its terminal velocity.
    8·1 answer
  • The primary coil of a transformer has 200 turns and the secondary coil has 800 turns. The power supplied to the primary coil is
    12·1 answer
  • When drawing a Bohr model for an element that has 16 electrons, how many electrons would be placed in the third energy level?
    5·1 answer
  • 1. A step-up transformer increases 15.7V to 110V. What is the current in the secondary as compared to the primary? Assume 100 pe
    9·1 answer
  • What physical property causes liquids to not separate in a container?
    12·2 answers
  • When does a magnet induce an electric current in a wire coil?
    9·1 answer
  • What the kinetic energy quantities in calculation pls help me​
    7·1 answer
  • The radius of our clock face is 9.2cm. It is 8:44; we are done at 9:11. How far will the minute hand (the larger one) travel?
    6·1 answer
  • A soft, silvery-white metal combines with a yellow gas to form a white crystal-like solid. What can be said about this change? T
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!