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
nekit [7.7K]
3 years ago
5

The motion of a particle is given by the equation v = 8t3 – ½ t2 + 4t, where v is in meters and t is in seconds. Compute the val

ue of a at t=0. I got 98 m/s^2 but the answer key says 50m/s^2 so I think it must have been a typo. Can someone please check?
Physics
1 answer:
Jlenok [28]3 years ago
4 0

Answer:

4 m/s²

Explanation:

v(t) = 8t³ – ½ t² + 4t

Acceleration is the first derivative of velocity with respect to time.

a = dv/dt

a = 24t² – t + 4

At t = 0, the acceleration is:

a = 4

You might be interested in
Hello please help i’ll give brainliest
malfutka [58]

Acceleration is the rate of change in an object's velocity

3 0
3 years ago
In Which senecio is an animal doing work
Arisa [49]

Answer:

A horse pulls a wagon along a road

4 0
3 years ago
The coefficient of linear expansion of copper is 17 x 10^-6 K-1. A block of copper 30 cm wide, 45 cm long, and 10 cm thick is he
schepotkina [342]

Answer:

The change in volume is 6.885\times 10^{- 5}\

Solution:

As per the question:

Coefficient of linear expansion of Copper, \alpha = 17\times 10^{- 6}\ K^{- 1}

Initial Temperature, T = 0^{\circ} = 273 K

Final Temperature, T' = 100^{\circ} = 273 + 100 = 373 K

Now,

Initial Volume of the block, V = 30\times 45\times 10\times 10^{- 6}\ m^{3} = 0.0135\ m^{3}

V' = V(1 + \gamma \Delta T)

\gamma = 3\alpha

V' = V(1 + 3\alpha \Delta T)

where

V' = Final volume

V' - V= 0.0135\times 17\times 10^{- 6} \times (T' - T))

\Delta V= 0.0135\times 3\times 17\times 10^{- 6} \times (373 - 273)) = 6.885\times 10^{- 5}\

7 0
3 years ago
Streams pick up a greater load of sand and gravel as they leave a mountain range and flow across a lowland.
inessss [21]
B

because it will pick it up while coming down not just flowing on low land<span />
6 0
3 years ago
Which is an important step in how an electric motor uses magnetic force to produce motion?
Fiesta28 [93]

Answer:B.As the north pole of the electromagnet nears the south pole of the permanent magnet, the current reverses and the poles of the magnets then repel.

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • A 6 kg block initially at rest is pulled to East along a horizontal surface with coefficient of kinetic friction μk=0.15 by a co
    5·1 answer
  • Velocity and acceleration are both vectors; they have a direction. What is thedirection of the velocity and acceleration vectors
    7·1 answer
  • Which of the Moon’s positions will cause the highest or spring tides?
    13·2 answers
  • A plane mirror and a concave mirror (f = 8.20 cm) are facing each other and are separated by a distance of 25.0 cm. An object is
    11·2 answers
  • What is the energy from the sun that is converted to electrical or thermal energy
    13·2 answers
  • Which type of graph would be best for showing the percentage of people in a family with different jobs? A. Circle graph B. Scatt
    15·1 answer
  • Question 25
    10·1 answer
  • 1. The magnitude of the electrostatic force a charge particle exerts on a 5.0nC particle 0.20m away from it is 18N. Find the mag
    6·1 answer
  • A snail con move at 3cm/s if it’s ke is 300joules what it it’s mass?
    12·1 answer
  • 5.1 What is the nucleus composed of ?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!