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
Rama09 [41]
3 years ago
6

Before the collision, the mass of the car is 1500kg, and the speed is 36km/hr, and the car is going to the north. What is its mo

mentum? Is its momentum a vector? If it is a vector, indicate it's direction and magnitude. (We can define the north as the positive direction in the following calculation)
Physics
2 answers:
blagie [28]3 years ago
4 0

Answer:

Answer is given in the attachment.

Explanation:

Download pdf
Delvig [45]3 years ago
4 0

Answer:

Momentum = 15000 kg·m/s

It is a vector.

Its direction is north and its magnitude is 15000 kg·m/s

Explanation:

Momentum is the product of mass and velocity.

P = mv

We have to convert to SI units.

P = (1500\ \text{kg})\left(\dfrac{36000\ \text{m}}{3600\ \text{s}}\right) = 15000\ \text{kg}\cdot\text{m/s}

Momentum is a vector because it is the product of a scalar (mass) and a vector (velocity). It points in the direction of the velocity, in this case, north. Its magnitude is as found above.

You might be interested in
A 2.3 m long wire weighing 0.075 N/m is suspended directly above an infinitely straight wire. The top wire carries a current of
ZanzabumX [31]

Answer:

Explanation:

Magnetic field near current carrying wire

= \frac{\mu_0}{4\pi} \frac{2i}{r}

i is current , r is distance from wire

B =  10⁻⁷ x \frac{2\times49}{r}

force on second wire per unit length

B I L , I is current in second wire , L is length of wire

=  10⁻⁷ x \frac{2\times49}{r} x 33 x 1

= 3234 x \frac{10^{-7}}{r}

This should balance weight of second wire per unit length

3234 x \frac{10^{-7}}{r} = .075

r = \frac{3234}{.075} x 10⁻⁷

= .0043 m

= .43 cm .

5 0
3 years ago
Now she is out on a hike and comes to the left bank of a river. There is no bridge and the right bank is 10.0 mm away horizontal
Harrizon [31]

Answer:

a. 8.96 m/s b. 1.81 m

Explanation:

Here is the complete question.

a) A long jumper leaves the ground at 45° above the horizontal and lands 8.2 m away.

What is her "takeoff" speed  v 0 ?

b) Now she is out on a hike and comes to the left bank of a river. There is no bridge and the right bank is 10.0 m away horizontally and 2.5 m, vertically below.  

If she long jumps from the edge of the left bank at 45° with the speed calculated in part a), how long, or short, of the opposite bank will she land?

a. Since she lands 8.2 m away and leaves at an angle of 45 above the horizontal, this is a case of projectile motion. We calculate the takeoff speed v₀ from R = v₀²sin2θ/g. where R = range = 8.2 m.

So, v₀ = √gR/sin2θ = √9.8 × 8.2/sin(2×45) = √80.36/sin90 = √80.36 = 8.96 m/s.

b. We use R = v₀²sin2θ/g to calculate how long or short of the opposite bank she will land. With v₀ = 8.96 m/s and θ = 45

R = 8.96²sin(2 × 45)/9.8 = 80.2816/9.8 = 8.192 m.

So she land 8.192 m away from her bank. The distance away from the opposite bank she lands is 10 - 8.192 m = 1.808 m ≅ 1.81 m

8 0
3 years ago
A 200 N trash can is pulled across the sidewalk by a person at constant speed by a force of 75 N. What is the coefficient of fri
Pavel [41]

Answer:

μ = 0.375

Explanation:

F = Applied force on the trash can = 75 N

W = weight of the trash can = 200 N

f = frictional force acting on trash can

Since the trash can moves at constant speed, force equation for the motion of can is given as

F - f = 0

75 - f = 0

f = 75 N

μ = Coefficient of friction

frictional force is given as

f = μ W

75 = μ (200)

μ = 0.375

5 0
3 years ago
How many Fahrenheit degrees are needed to equal one Celsius (or Kelvin) degree?
Nat2105 [25]
One Celsius degree is the same size as one Kelvin. Each of them is the size of 1.8 Fahrenheit degrees.
3 0
2 years ago
675 km equals how much cm ?
irga5000 [103]
KHDMDCM.
Now go from Kilometer to Centimeter: 5.
Move the decimal 5 places to the right: 67,500,000 centimeters.
Hope this helps :)
7 0
3 years ago
Other questions:
  • Which of the following actions is best understood using Einstein's concepts rather than Newtonian physics?
    10·2 answers
  • A single brick falls with acceleration g. The reason a double brick falls with the same acceleration is
    8·2 answers
  • Which of the circuit offers greater resistance to the flow of current 1A or 2A ?
    11·2 answers
  • Meteorologists classify tropical cyclones using a measurement of sustained winds within the low-pressure system. How do meteorol
    9·1 answer
  • The current in a hair dryer measures 20.0 amps. The resistance of the hair dryer is 6 ohms. What is the voltage?
    14·1 answer
  • A particle moving along the x-axis has its velocity described by the function vx =2t2m/s, where t is in s. its initial position
    10·1 answer
  • When a project is completed on time, the project team must accomplish all of the following activities EXCEPT: ​
    6·1 answer
  • Which type of electromagnetic radiation is responsible for the colors of<br> objects?
    7·1 answer
  • The electromagnetic wave that CT scans are based on is called
    9·2 answers
  • Use the table of electric force between objects in two different interactions to answer the question. Interaction Charge on Obje
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!