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
Y_Kistochka [10]
3 years ago
10

At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constan

t acceleration of 2.40 m/s^2. At the same instant, a truck, traveling with a constant speed of 15.5 m/s, overtakes and passes the automobile.
How far beyond its starting point does the automobile overtake the truck?

How fast is the automobile traveling when it overtakes the truck?
Physics
1 answer:
Aloiza [94]3 years ago
4 0

Answer

given,

Initial speed of the car = 0 m/s

acceleration of car = 2.4 m/s²

Speed of the truck = 15.5 m/s

to car to overtake the truck distance travel by both should be same

distance traveled by the truck

d = 15.5 t

distance traveled by the car

d = u t + 1/2 gt ²

d = 0.5 x 9.8 t²

now, equating both the equations

15.5 t = 4.9 t²

t = 3.163 s

Time taken by car to overtake truck is 3.163 s

distance travel by the car = 15.5 x 3.163

d = 49 m

b) Speed of the automobile

using equation of motion

    v = u + at

    v = 0 + 2.4 x 3.163

    v = 7.59 m/s

Speed of the automobile while crossing truck is equal to v = 7.59 m/s

You might be interested in
Light from the sun reaches the earth in 8.3 minutes. the speed of light is 3.0  108 m/s. in kilometers, how far is the earth fr
Flura [38]
To determine the distance of the light that has traveled given the time it takes to travel that distance, we need a relation that would relate time with distance. In any case, it would be the speed of the motion or specifically the speed of light that is travelling which is given as 3x10^8 meters per second. So, we simply multiply the time to the speed. Before doing so, we need to remember that the units should be homogeneous. We do as follows:

distance = 3x10^8 m/s ( 8.3 min ) ( 60 s / 1 min ) = 1.494x10^11 m

Since we are asked for the distance to be in kilometers, we convert

distance = 1.494x10^11 m ( 1 km / 1000 m) = 149400000 km
6 0
3 years ago
During a tornado in 2008 the Peachtree Plaza Westin Hotel in downtown Atlanta suffered damage. Suppose a piece of glass dropped
Darina [25.2K]

Answer:

Time = t = 6.62 s

Explanation:

Given data:

Height = h = 215 m

Initial velocity = v_{i} = 0 m/s

gravitational acceleration = g = 9.8 m/s²

Time = t = ?

According to second equation of motion

                            h = v_{i}t + \frac{1}{2}gt^{2}

As initial velocity is zero, So the first term of right hand side of above equation equal to zero.

                                 h = \frac{1}{2}gt^{2}

                                        t² = \frac{2h}{g}

                                         t =\sqrt{\frac{2h}{g} }

                                         t = \sqrt{\frac{(2)(215) }{9.8} }

                                         t = 6.62 s

3 0
3 years ago
Which statement does not describe the relationship between genes and
jek_recluse [69]

Answer: C. Inherited traits carry the instructions for individual genes.

Explanation: bejewels I know stuff. ☆ - ~ hope this helps

4 0
3 years ago
Read 2 more answers
Mass is a measure of weight. True False
8_murik_8 [283]

Answer: False

Explanation: Mass is a measure of the amount of matter in an object.

5 0
2 years ago
Read 2 more answers
The organ procurement and transplant network (OPTN) was established by?
damaskus [11]
The answer to that would be A. the national organ transplant Act of 1984 the goals of the OPTN  are to increase the number of and access to transplants, improve survival rates after transplantation, and to promote patient safety and efficient management of the system.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement describes one feature of a closed circuit? Charges do not flow. Bulbs will not shine. The circuit is broken. The
    13·2 answers
  • Ezra is pulling a sled, filled with snow, by pulling on a rope attached to the sled. The rope makes an angle θ with respect to t
    15·1 answer
  • ou have designed and constructed a solenoid to produce a magnetic field equal in magnitude to that of the Earth (5.0 10-5 T). If
    5·1 answer
  • Two points are given in polar coordinates by : (r, θ) = (2.60 m, 50.0°)
    7·1 answer
  • Which process represents a chemical change
    9·2 answers
  • Problem 13.145 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This is a multi-part question. Once an answer is submitte
    7·1 answer
  • What do I due about strict teachers
    5·1 answer
  • Are these right? Just need you to confirm or tell we what I got wrong. Thanks​
    10·1 answer
  • A 25-ft ladder rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of 0.18 ft/sec, ho
    13·1 answer
  • True/False: The core, mantle, and crust explanation for the Earth's layers is outdated and now we use the 5 layer explanation. *
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!