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
harkovskaia [24]
3 years ago
5

A car slows from 27 m/s to 5 m/s with a constant acceleration for 6.87 s. What is the car’s acceleration?

Physics
1 answer:
Kobotan [32]3 years ago
5 0

In this case, the movement is uniformly delayed (the final rapidity is less than the initial rapidity), therefore, the value of the acceleration will be negative.

1. The following equation is used:

a = (Vf-Vo)/ t

a: acceleration (m/s2)

Vf: final rapidity (m/s)

Vo: initial rapidity (m/s)

t: time (s)

2. Substituting the values in the equation:

a = (5 m/s- 27 m/s)/6.87 s

3. The car's acceleration is:

a= -3.20 m/ s<span>^2</span>

You might be interested in
A person jumps from the roof of a house 3.1-m high. When he strikes the ground below, he bends his knees so that his torso decel
Sveta_85 [38]
Part A

Free fall motion
h = 3.1 m

Equation: Vf = √(2gh) = √(2*9.8 m/s^2 * 3.1 m) = 7.8 m/s

That is the only part in the question.
3 0
3 years ago
At a particular instant, a moving body has a kinetic energy of 295 J and a momentum of magnitude 25.1 kg · m/s.(a)What is the sp
motikmotik

Answer:

a) 23.51 m/s

b) 1.07 kg

Explanation:

Parameters given:

Kinetic energy, K = 295 J

Momentum, p = 25.1 kgm/s

a) The kinetic energy of a body is given as:

K = \frac{1}{2} mv^2

where m = mass of the body and v = speed of the body

We know that momentum is given as:

p = mv

Therefore:

K = 1/2 * pv

=> v = 2K / p

v = (2 * 295) / 25.1 = 23.51 m/s

The velocity of the body at that instant is 23.51 m/s.

b) Momentum is given as:

p = mv

=> m = p / v

m = 25.1 / 23.51  = 1.07 kg

The mass of the body at that instant is 1.07 kg

5 0
3 years ago
While running these tests, crall notices a similarity in the velocity measured at the ground independent of whether the tennis b
lara [203]

At the ground the ball will always have velocity along the direction of gravity. If upward motion is taken positive it will always have negative velocity at the ground because, if the ball was given an initial upward velocity then gravity will decelerate it and bring it down with a negative final velocity. If the ball is given an initial downward velocity then the ball will be further accelerated by gravity in the downward direction only, again maintaining negative direction. The magnitude however in both cases will be different. the final velocity at the ground will have higher magnitude in case of elevator moving downwards.

6 0
3 years ago
Read 2 more answers
Mercury, a planet in our Solar System, and Callisto, a moon of the planet Jupiter, are about the same size. However, Mercury’s m
TiliK225 [7]
You may jump higher because the more the mass of the planet, the more gravitational force. There is less mass(and gravity) on Callisto so you wouldn’t be weighed down as much and can jump higher. Whereas on Jupiter there is more weight holding you down.
3 0
3 years ago
Read 2 more answers
16)
VMariaS [17]

Answer:

a.proton, proton

hope this helped :) have a goodday

6 0
3 years ago
Other questions:
  • Matter is made up of very small particles
    13·1 answer
  • Can 200 watts lift a 100 kg box,and if so how long would it take?
    12·1 answer
  • Based on the information in the graph, which of the atoms listed below is the most stable?
    15·2 answers
  • Which clue can be used to identify a chemical reaction as a replacement reaction?
    10·2 answers
  • Suppose a star the size of our Sun, but with mass 9.0 times as great, were rotating at a speed of 1.0 revolution every 7.0 days.
    11·1 answer
  • Rutherford's gold foil experiment revealed the atom has what subatomic particle
    6·1 answer
  • What types of properties does light have
    5·2 answers
  • How does your education contribute to comunity development
    6·1 answer
  • A 26.5 g object is thrown straight up into the air. If the object's initial speed is 1.60 m/s, determine how high the object wil
    10·1 answer
  • According to Newton’s 2nd law of motion: objects at a rest will remain in rest unless acted upon
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!