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
rodikova [14]
3 years ago
7

A high-jumper clears the bar and has a downward velocity of - 5.00 m/s just before landing on an air mattress and bouncing up at

1.0 m/s. The mass of the high-jumper is 60.0 kg. What is the magnitude and direction of the impulse that the air mattress exerts on her
Physics
1 answer:
Jobisdone [24]3 years ago
8 0

-- As she lands on the air mattress, her momentum is (m v)

Momentum = (60 kg) (5 m/s down) = 300 kg-m/s down

-- As she leaves it after the bounce,

Momentum = (60 kg) (1 m/s up) = 60 kg-m/s up

-- The impulse (change in momentum) is

Change = (60 kg-m/s up) - (300 kg-m/s down)

Magnitude of the change = <em>360 km-m/s </em>

The direction of the change is <em>up /\ </em>.

You might be interested in
*deleting* lol sorryrryrioa
kicyunya [14]

Answer:

Huh? otay....

Explanation:

Brainliest?????????

3 0
3 years ago
Read 2 more answers
A charged particle of mass 0.0050 kg is subjected to a 5.0 T magnetic field which acts at a right angle to its motion. If the pa
Irina18 [472]

Answer:

0.01 C

Explanation:

Applying,

F = qvBsinФ................ Equation 1

Where F = Force on the charged particle, q = charge on the particle, v = velocity, B = magnetic field, Ф =  angle

Since the charged particle noves in a circle,

F = mv²/r................. Equation 2

Where m = mass of the particle, v = velocity of the particle, r = radius of the  circle

Substitute equation 2 into equation 1

mv²/r = qvBsinФ

make q the subject of the equation

q = mv/(rBsinФ)............. Equation 3

Given: m = 0.005 kg, v = 2 m/s, r = 0.2 m, B = 5 T, Ф = 90° (Act at right angle)

Substitute these values into equation 3

q = (0.005×2)/(0.2×5×sin90°)

q = 0.01/(1)

q = 0.01 C

5 0
3 years ago
Item 4 Which conditions produce the smallest and largest ocean waves? Choose the two correct answers.
Darya [45]

Answer:

strong winds that blow for a long time over a great distance

weak winds that blow for short periods of time with a short fetch

Explanation:

When the winds are weak and blow for short periods, we experience the smallest ocean waves but when there are strong winds over a longer duration, the largest ocean waves are seen. Therefore, the conditions to produce the smallest and largest ocean waves are strong winds that blow for a long time over a great distance and weak winds that blow for short periods of time with a short fetch.

5 0
3 years ago
Read 2 more answers
What are two processes that result in rocks being broken down into smaller pieces ?
meriva
Mechanical and Chemical. (Weathering and erosion)
5 0
3 years ago
Read 2 more answers
Tarzan (75 kg) swings from 4 metres high on a vine down to ground level and catches Jane (50 kg). How fast are they moving after
Kruka [31]

Try this solution (if it is possible, check it in other sources):

1. for m_Tarzan=75kg., initial_height=4m., end_height=0 m. and g=10 N/kg. Energy is:

E=m_{Tarzan}*(H_{initial}-H_{end})*g=75*4*10=3000(J).

2. The same value of Energy is applied for m_Tarzan+Jane=75+50=125 kg.:

E=\frac{m_{Tarzan+Jane}* Speed^2}{2}; \ => \ Speed=\sqrt{ \frac{2*E}{m_{Tarzan+Jane}}};

3. According to the formula of the Speed:

Speed=sqrt(6000/125)=sqrt(48)=4sqrt(3)≈4*1.71=6.84 (m/s)


Answer: 6.84 (m. per sec.)

5 0
3 years ago
Other questions:
  • Some homes that use baseboard heating use copper tubing. hot water runs through and heats the copper tubing, which in turn heats
    9·1 answer
  • Compared to oceanic crust, continental crust is generally
    10·1 answer
  • An ultrasonic ruler, such as the one discussed in Example 4 in Section 16.6, displays the distance between the ruler and an obje
    11·1 answer
  • Chemists measure energy in units of _________ because it is based on heating water. Since most chemical reactions are doing in w
    6·1 answer
  • Which of the following factors might be affected by a wildfire? a. food b. shelter c. biodiversity d. all of the above Please se
    14·2 answers
  • The Celsius tempersture scale is based on which of the following? a) vapor b) the human body c) the boiling point of air d) the
    13·2 answers
  • a block (mass 0.6kg) is released from rest at point A at the top of a ramp inclined at 36.9 degress above the horizontal. The bl
    15·1 answer
  • The wattage of a bulb is 24 W when it is connected to a 12 V battery. Calculate its effective wattage if it operates on a 6 V ba
    12·2 answers
  • A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the
    7·1 answer
  • Visible light waves do not diffract as well as radio waves because
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!