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
seropon [69]
4 years ago
11

The formula d = 1.1 t 2 + t + 1 expresses a car's distance (in feet to the north of an intersection, d , in terms of the number

of seconds t since the car started to move. As the time t since the car started to move increases from t = 3 to t = 5 seconds, what constant speed must a truck travel to cover the same distance as the car over this 2-second interval?
Physics
2 answers:
Phantasy [73]4 years ago
5 0

d(t) = 1.1t² + t + 1

The constant speed required to cover the same distance between t = 3 to t = 5 is the same as the average speed over that same time interval. It is given by:

v = Δx/Δt

v = average speed, Δx = change in distance, Δt = elapsed time

Given values:

Δx = d(5) - d(3) = 19.6ft

Δt = 5s - 3s = 2s

Plug in and solve for v:

v = 19.6/2

v = 9.8ft/s

Margaret [11]4 years ago
3 0

Answer:

9.8 ft/s

Explanation:

The formula for the distance (d, in ft) traveled by a cer to the north of an intersection is:

d = 1.1 t² + t + 1

where,

t is the time in seconds

The distance traveled in the first 3 seconds is:

d(3) = 1.1 × (3)² + 3 + 1 = 13.9 ft

The distance traveled in the first 5 seconds is:

d(5) = 1.1 × (5)² + 5 + 1 = 33.5 ft

The distance traveled in the 3-5 s interval is:

d(5) - d(3) = 33.5 ft - 13.9 ft = 19.6 ft

A truck should cover the same distance (19.6 ft) in the same time (2s). It must have a constant speed of:

v = d/t = 19.6 ft/2s = 9.8 ft/s

You might be interested in
if large amount of heat are transferred to a solid, what will probably happen to the state of the solid?
Anna007 [38]
The solid can melt down to a liquid like state, and if you keep applying heat, it would eventually become a gas state.
3 0
3 years ago
Read 2 more answers
You live on a planet far from ours. "Based on extensive communication with a physicist on earth", you have determined that all l
Ugo [173]

Answer:

8.56 m/s2

Explanation:

Using law of energy conservation while taking into account of the rotational and translation kinetic energy, when the solid cylinder rolls down the incline we have the potential energy converted to kinetic energy:

E_p = E_{kv} + E_{k\omega}

mgh = mv^2/2 + I\omega^2/2

where m is the mass, I = mr^2/2 is the moments of inertia of the solid cylinder \omega = v / r is the angular speed of the cylinder

mgh = mv^2/2 + \frac{mr^2}{2}\frac{(v/r)^2}{2}

mgh = mv^2/2 + mv^2/4 = 3mv^2/4

h = 3v^2/(4g)

So if you plot a liner chart of h vs v^2 and get a slope of 6.42 then that means 3/(4g) = 6.42 so g = 6.42*4/3 = 8.56 m/s^2

The gravitational acceleration on this planet is 8.56 m/s2

3 0
4 years ago
The relationship among speed, distance, and time is
alexdok [17]
Distance= speed (multiplied by) time
3 0
3 years ago
Read 2 more answers
A person throws a 0.21-kg ball straight up into the air. It reaches a height of
Brrunno [24]

Answer:

A

Explanation:

As it begins to fall

F = ma        a = 9.81

F = .21 * 9.81 = 2.06 N

7 0
2 years ago
What makes up the majority of the solar system<br><br><br><br>space
Setler [38]
Matter makes up all of the universe
7 0
3 years ago
Other questions:
  • What is the scientific term for rocks formed in to magma
    8·2 answers
  • About how many known elements are there on Earth? Are they all naturally made?
    7·2 answers
  • Why are chloroplasts found in plant cells but NOT in animal cells?
    6·1 answer
  • Which explains why a gas does not have a fixed shape
    9·1 answer
  • which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension
    8·1 answer
  • Suppose a point charge is located at the center of a spherical surface. The electric field at the surface of the sphere and the
    13·1 answer
  • What do you do abt onion eyes (MY EYES ARE BURNING BADDD)
    6·1 answer
  • The Brazilian rain forest is an area with significant biodiversity. As the rain forest is replaced with agricultural land, it is
    9·2 answers
  • State, with a reason, whether hotdog relish a homogeneous mixture or a heterogeneous mixture.
    14·2 answers
  • If a snowboarder’s initial speed is 4 m/s and comes to rest when making it to the upper level. With a slightly greater initial s
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!