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
jeka57 [31]
3 years ago
13

A car moving in the positive direction with an initial velocity of 26 m/s slows down at a constant rate of -3 m/s2. What is its

velocity after 7 seconds of deceleration? Round the final answer to the nearest whole number.
Physics
1 answer:
Greeley [361]3 years ago
8 0
The answer is 5 m/s
- 3 =  \frac{x - 26}{ 7}  \\ x =  \frac{7 \times(  - 3)}{1}  + 26 =  - 21 + 26 \\  = 5




good luck
You might be interested in
Martha designed the model shown below to represent the positions of earth, sun, and moon during tides. the model most likely rep
Luda [366]
 the model most likely represents the positions of earth, sun, and moon when there is: greatest difference between high and low tides
The high and low tides are created because of the combination of effects from the moon's gravitational forces with the sun's gravitational forces that affect the tide as the earth rotates
6 0
3 years ago
A small rubber wheel is used to drive a large pottery wheel. The two wheels are mounted so that their circular edges touch. The
Goshia [24]

Answer:

0.629\ \text{rad/s}^2 counterclockwise

9.98\ \text{s}

Explanation:

r_1 = Small drive wheel radius = 2.2 cm

\alpha_1 = Angular acceleration of the small drive wheel = 8\ \text{rad/s}^2

r_2 = Radius of pottery wheel = 28 cm

\alpha_2 = Angular acceleration of pottery wheel

As the linear acceleration of the system is conserved we have

r_1\alpha_1=r_2\alpha_2\\\Rightarrow \alpha_2=\dfrac{r_1\alpha_1}{r_2}\\\Rightarrow \alpha_2=\dfrac{2.2\times 8}{28}\\\Rightarrow \alpha_2=0.629\ \text{rad/s}^2

The angular acceleration of the pottery wheel is 0.629\ \text{rad/s}^2.

The rubber drive wheel is rotating in clockwise direction so the pottery wheel will rotate counterclockwise.

\omega_i = Initial angular velocity = 0

\omega_f = Final angular velocity = 60\ \text{rpm}\times \dfrac{2\pi}{60}=6.28\ \text{rad/s}

t = Time taken

From the kinematic equations of linear motion we have

\omega_f=\omega_i+\alpha_2t\\\Rightarrow t=\dfrac{\omega_f-\omega_i}{\alpha_2}\\\Rightarrow t=\dfrac{6.28-0}{0.629}\\\Rightarrow t=9.98\ \text{s}

The time it takes the pottery wheel to reach the required speed is 9.98\ \text{s}

4 0
3 years ago
Do you think energy can be “used up?” Why or why not?
My name is Ann [436]
I dint think energy can be used up because energy cant be created nor destroyed
8 0
3 years ago
The orbit of a certain a satellite has a semimajor axis of 4.0 x 107 m and an eccentricity of 0.15. Its perigee (minimum distanc
Mashutka [201]

Answer:

100KM and 1kkm

Explanation:

5 0
4 years ago
Rosa eats a peanut butter sandwich for lunch. Peanut butter contains a lot
shusha [124]
Cmndkdkkdnd djnd dhdbhd s ahah who w baggage wbhebwnwh
4 0
3 years ago
Other questions:
  • a bowling ball is rolling down the hall at a constant speed of 1.5 m/s. how far will the ball roll in 6.0 s.​
    6·1 answer
  • Which option identifies the two natural wind patterns that move air masses in the United States?
    9·2 answers
  • Heat is an exchange of internal energy from one system to another due to
    13·1 answer
  • A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the dec
    9·1 answer
  • Make the following conversion.<br><br> 50.5 cm = _____ hm
    5·2 answers
  • Two blocks are arranged at the ends of a massless cord over a frictionless massless pulley as shown in the figure. Assume the sy
    12·1 answer
  • What did Rutherford conclude from the motion of the particles when shot through a thin gold foil
    9·1 answer
  • What is the focal length of concave mirror that magnifies , by a factor of +3.2 , an object that is placed 30cm from the mirror?
    5·1 answer
  • Why the friction between an object and a surface is less than when the surface is titled than when the same surface is horizonta
    13·1 answer
  • Tectonic processes are fueled by heat from __________, while atmospheric convection is fueled by heat from ___________.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!