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
Vikentia [17]
2 years ago
12

A person drives a car around a circular cloverleaf with a radius of 77 m at a uniform speed of 10 m/s. What is the acceleration

of the car?
Physics
1 answer:
umka2103 [35]2 years ago
6 0

Answer:

770m/s

Explanation:

caculation using one of the newton law of motion

You might be interested in
A soccer ball is kicked and left
Vedmedyk [2.9K]

Answer:

Explanation:

Considering that this is parabolic motion, we know that the time the ball is in the air begins the instant it leaves the ground, reaches up to its max height, and then begins falling until it reaches the ground. Duh, right? Some important things happen during this trip. There are a few things we need to know in order to even begin the problem. Parabolic motion has x and y coordinates because it is 2-dimmensional; the acceleration in the x dimension is not the same as the acceleration in the y dimension; the velocity of an object at its max height is always 0; the time it takes to reach its max height (where the max height is half the distance the object travels) is half the time it takes to make the whole trip. Yikes. That's a lot to know and much to remember! Don't you just LOVE physics!?

For a. the hang time is the time the ball was in the air. Some of that stuff we talked about above is pertinent to solving this problem. We know that the velocity of the ball is 0 at its max height, and we also know that if we find the time it takes to reach its max height, we can double that number to find how long it was in the air for the whole trip. Use the one-dimensional equation

v=v_0+at to find out how long it took to reach the max height. Even though we don't yet know the max height, we DO know that the velocity at that point is 0. BUT before we do that, since we are working in the y-dimension only, it would behoove us (benefit us) to find the velocity particular to this dimension. We are going to answer c. first, then backtrack.

c. wants the initial vertical velocity. That is found in the magnitude of the "blanket" or generic velocity times the sin of the angle, namely:

V_y=25sin(45) so

V_y= 18 m/s Now we can use that as the initial upwards velocity in part a:

v=v_0+at and filling in:

0 = 18 + (-9.8)t and

-18 = -9.8t so

t = 1.8 seconds. But remember, this is only half the time it was in the air. The whole trip, then, takes 2(1.8) which is

t = 3.6 seconds

That's a and c. Now for b:

b. asks for the x component of the velocity:

V_x=Vcos\theta which works out to be the same as the vertical velocity, since the sin and cos of 45 degrees is the same:

V_x=25cos45 and

V_x= 18 m/s

Onto d:

d. wants the max height. Remember, it took 1.8 seconds to get to the max height, so using yet another one-dimensional equation:

Δx = v₀t + \frac{1}{2}at^2 where Δx is the displacement, v₀ is the initial upwards velocity, a is the pull of gravity, and t is the time it takes to reach that max height (Δx, our unknown). Filling in:

Δx = 18(1.8)+\frac{1}{2}(-9.8)(1.8)^2 and if you do the rounding correctly, you'll end up with this:

Δx = 32 - 16 so

the max height, Δx, is 16 meters.

e. wants the range. That translates to the distance the ball traveled. This is found in a glorified version of d = rt, where d is displacement, r is velocity, and t is...well, time (that doesn't change):

Δx = vt so

Δx = 18(3.6) remember that the ball was in the air for a total of 3.6 seconds, so

Δx = 65 meters.

Phew!!!!! That's a lot! I suggest you learn your physics or this will make you insane by the end of the course!

6 0
3 years ago
1. Which will speed up the rate of a chemical
marusya05 [52]

⚠WARNING DO NOT JOIN THE ZOOM OF 825 338 1513⚠ OR DO NOT JOIN ANY ZOOMS FROM ANYONE EXCEPT REAL LIFE FRIENDS OR FRIENDS FAMILY OR TEACHERS! HIS ZOOM NAME IS Mysterious Men HE ASKS GIRLS TO DO INAPPROPRIATE THINGS PLS COPY AND PASTE THIS TO OTHER COMMENT SECTIONS! PLS PASS THIS AROUND

8 0
2 years ago
Collision 2: Blue Cart Moving Slower than the Red Cart
pshichka [43]

Answer:

this is what i always used

Explanation:

http://www.sjutsscience.com/uploads/3/7/4/5/37458459/phet_collision_lab_2020_key.pdf

3 0
2 years ago
A football is thrown at an initial velocity of 51 mph at an angle of 37 degrees. How many yards is the football thrown
Allisa [31]

Answer:250.03m

Explanation:

Initial velocity =u=51mph

Angle=β=37

Acceleration due to gravity=g=10

The distance covered by the football is the range

Range=(u^2xsin2β)/g

Range=(51^2xsin(2x37))/10

Range=(51x51xsin74)/10

Range=(2601xsin74)/10

Range=(2601x0.9613)/10

Range=(2500.3)/10

Range=250.03m

3 0
3 years ago
What is the average for the following set of measurements 3.1 mL, 2.7 mL, 4.6 mL, 1.9mL, 8.7 mL
Oksanka [162]
C. 4.2 mL
3.1+2.7+4.6+1.9+8.7mL=21
there are 5 numbers
21÷5=4.2
6 0
3 years ago
Other questions:
  • Two loudspeakers in a plane, 5.0m apart, are playing the same frequency. If you stand 14.0m in front of the plane of the speaker
    14·1 answer
  • Newtons prism experiments showed that white sunlight is made up of
    9·2 answers
  • A force does 210 J of work when it acts on a moving object and its direction is in the same direction as the object’s displaceme
    14·1 answer
  • Identify the type of force described (contact or noncontact):
    13·2 answers
  • in bohr's atomic theory when electron moves from one energy level to another energy level more distant from the nucleus energy i
    12·1 answer
  • A Shaolin monk of mass 60 kg is able to do a ‘finger stand’: he supports his whole weight on his two index fingers, giving him a
    8·1 answer
  • How much does it cost to operate a 90 W light bulb for one day if the cost per kilowatt-hour is $0.08
    13·1 answer
  • Which unit of measure is the correct SIunit to use in measuring the mass of a boulder?
    10·2 answers
  • What controls whether a lava flow is aa or pahoehoe
    6·1 answer
  • Two positive point charges are 4.9cm apart. If the electric potential energy is 70.0 μJ, what is the magnitude of the force betw
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!