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
Juli2301 [7.4K]
3 years ago
7

a car travels at 15 m/s for 10 s. It then speeds up with a constant acceleration of 2.0 m/s? for 15 s. At the end of this time,

what is its velocity?
Physics
1 answer:
Firlakuza [10]3 years ago
6 0

V = u + at where u is initial velocity (15 m/s), a is acceleration (2m/s^2) and t is time (15 seconds)

V = 15 + 2 X 15

V = 45 m/s

You might be interested in
A 2530-kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass) provides a thrust force so that
gavmur [86]

Answer:

A = 1.4 m/s²

B = -0.10493 m/s³

a = 1.29507 m/s²

T = 28095.8271 N

T = 1.13198 W

Explanation:

t = Time taken

g = Acceleration due to gravity = 9.81 m/s²

The equation

v(t)=At+Bt^2

Differentiating with respect to time

\frac{dv}{dt}=\frac{d(At+Bt^2)}{dt}\\\Rightarrow 1.4=A+2Bt

At t = 0

1.4=A

Hence, A = 1.4 m/s²

B=\frac{v-At}{t^2}\\\Rightarrow B=\frac{2.18-1.4\times 1.8}{1.8^2}\\\Rightarrow B=-0.10493\ m/s^3

B = -0.10493 m/s³

At t = 5 seconds

a=1.4+2\times -0.010493\times 5=1.29507\ m/s^2

a = 1.29507 m/s²

T=m(a+g)\\\Rightarrow T=2530(1.29507+9.81)\\\Rightarrow T=28095.8271\ N

T = 28095.8271 N

Weight of rocket

W=2530\times 9.81=24819.9\ N

\frac{T}{W}=\frac{28095.8271}{24819.9}\\\Rightarrow \frac{T}{W}=1.13198\\\Rightarrow T=1.13198W

T = 1.13198 W

3 0
3 years ago
( PLEASE HURRY, WILL GIVE BRAINLIEST IF CORRECT )
Korolek [52]

Answer:

b

Explanation:

5 0
2 years ago
Read 2 more answers
How many copies of a gene does an organism have in its cells
creativ13 [48]
Typically two copies in each cell.
6 0
3 years ago
What aspect of our health do we have the MOST influence over?
Pavlova-9 [17]
C might be the answer
3 0
3 years ago
Read 2 more answers
The density of this material is 2 g/cm3 there are 24 cm3 find the total mass
Fynjy0 [20]

Answer:

<h2>The answer is 48 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2 × 24

We have the final answer as

<h3>48 g</h3>

Hope this helps you

7 0
3 years ago
Other questions:
  • 3. When encountering low visibility from rain or fog, you
    9·2 answers
  • Onur drops a basketball from a height of 10m on Mars, where the acceleration due to gravity has a magnitude of 3.7m/s2.​ We want
    13·1 answer
  • The force applied when using a simple machine
    7·2 answers
  • A boy pulls a wagon with an applied force of 40 N on frictionless surface. If the mass of the wagon is 13kg, what is the acceler
    11·1 answer
  • Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?
    10·2 answers
  • If a group of workers can apply a force of 1000 newtons to move a crate 20.0 meters on a frictionless ramp: How high up a ramp w
    11·1 answer
  • This is a question on my science hw.
    10·2 answers
  • A 400-kg space probe has a weight of 3,560 N on one of the above planets. According to the table
    7·1 answer
  • Find the resistance of a stereo: current is 7 A voltage is 49 V.
    11·1 answer
  • Please help
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!