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
zvonat [6]
3 years ago
9

An ice sled powered by a rocket engine starts from rest on a large frozen lake and accelerates at 12.7 m/s2 . At t1 the rocket e

ngine is shut down and the sled moves with constant velocity v for another t2 s. The total distance traveled by the sled is 5.85 × 103 m and the total time is 94.6 s. Find t1. Answer in units of s.
Physics
1 answer:
sp2606 [1]3 years ago
6 0

Answer:

The value of t₁ is 5.119 sec.

Explanation:

Given that,

Acceleration = 12.7 m/s²

Total distance D=5.85\times10^{3}\ m

Time = 94.6 sec

We need to calculate the distance

Using equation of motion

s=ut+\dfrac{1}{2}at^2

Put the value into the formula

s_{1}=0+\dfrac{1}{2}12.7t_{1}^2...(I)

We need to calculate the velocity

Using equation of motion

v=u+at

Put the value into the formula

v=0+12.7t_{1}

v=12.7t_{1}

The sled while moves with constant velocity v for time t₂

Using formula of distance

s_{2}=vt_{2}

s_{2}=12.7t_{1}t_{2}

The total distance is

s_{1}+s_{2}=5.85\times10^{3}

Put the value of s₁ and s₂

\dfrac{1}{2}12.7t_{1}^2+12.7t_{1}t_{2}=5.85\times10^{3}

6.35t_{1}+12.7t_{1}t_{2}=5.85\times10^{3}...(II)

The total time is

t_{1}+t_{2}=94.6....(III)

From equation (II) and (III)

After solving

t_{1}=5.119\ sec

Hence, The value of t₁ is 5.119 sec.

You might be interested in
The following quantities describe location or its change:position, distance, and a displacement. Which are vectors?
-Dominant- [34]

As per the question there are three physical quantities named as position,distance and displacement.

Before coming into a conclusion first we have to understand a vector and a scalar.

A scalar quantity is a quantity which has only magnitude for it's complete specifications.

A vector is a quantity which has magnitude as well as direction and at the same time it is in accordance with the paraellogram law of vector addition.

Out of the three options displacement and position are vector quantities.It is because it is the minimum distance between two points .It has magnitude as well as direction.

Distance can not be considered as a vector quantity as it has only magnitude.There is no specific directions of distance travelled.

Position vector is a vector which provides location of an object in a plane or space.It is nothing else except the point which has x,y,z coordinates with origin is taken as the reference point.

Hence position and displacement are vectors

6 0
3 years ago
Read 2 more answers
In an iron rod the particles vibrate. If one end of an iron rod is heated, the vibrating particles transfer energy to neighborin
dalvyx [7]

Answer:

Conduction

Explanation:

Conduction. When a substance is heated, its particles gain internal energy and move more vigorously. The particles bump into nearby particles and make them vibrate more. This passes internal energy through the substance by conduction , from the hot end to the cold end.

6 0
4 years ago
A dime is 1.35 mm thick. How many dimes would it take to reach the height of a table that is 32.0 inches tall? (1.00 inches = 2.
ELEN [110]

Answer:

602 dimes

Explanation:

I converted the dimes hight to inches then divided it by 32 getting the amount of dime required to reach that hight

3 0
3 years ago
When a quarterback throws a football, the throwing arm is slowed down to rest during the deceleration phase. Of the angular velo
asambeis [7]

Answer:

The deceleration is 4 times higher for 0.5sec than for 2 sec.

Explanation:

If the deceleration happens from 1800deg/sec to zero in 2 sec we have that the magnitude is:

a_{1}=w/t_{1}=(1800deg/sec)/2sec=900 deg/sec^{2}

if now the time to decelerate is 0.5sec:

a_{2}=w/t_{2}=(1800deg/sec)/0.5sec=3600 deg/sec^{2}

The deceleration is now 4 times higher than the previous situation.

3 0
3 years ago
This is my first question don’t really know how to use this app yet lol but somebody answer it for me pls!! Seded the corredare
miskamm [114]
3x6



(This just for extras )
7 0
3 years ago
Other questions:
  • 3. A crew team rows a boat at a rate of 20 km/h in still water. Beginning at time = 0 minutes, the team rows for 30 minutes up a
    14·2 answers
  • for the meter stick shown in figure 10-4, the force F1 10.0N acts at 10.0cm. what is the magnitude of the torque due to f1 about
    11·1 answer
  • Your neighbor Paul has rented a truck with a loading ramp. The ramp is tilted upward at 35 ∘,and Paul is pulling a large crate u
    13·1 answer
  • What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1
    8·1 answer
  • A ball at rest rolls across a frictionless floor at 12.0 m/s/s. How far will it travel in
    5·1 answer
  • How are the current moving in the simulation of battery
    14·1 answer
  • A flat, circular, copper loop of radius r is at rest in a uniform magnetic field of magnitude B that extends far beyond the edge
    9·1 answer
  • Can someone take there time and answer this:}
    8·1 answer
  • A car has a speed of 20 m/s. If the speed of the car increases to 30 m/s in 5 seconds, what is the car’s acceleration?
    10·1 answer
  • Based on the images seen here, identify which phase of matter would transmit sound waves the fastest, and why?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!