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
svlad2 [7]
3 years ago
6

A golf ball bounces down a flight of steel stairs, striking several steps on the way down, but never hitting the edge of a step.

The ball starts at the top step with a vertical velocity component of zero. If all the collisions with the stairs are elastic, and if the vertical height of the staircase is 2.63 m, determine the bounce height when the ball reaches the bottom of the stairs. Neglect air resistance.
Physics
1 answer:
frez [133]3 years ago
3 0

Answer:

2.63m

Explanation:

In order to use this expression, we must calculate the values of Velocity (V0) and Velocity(Ve). The initial velocity has only a horizontal component V(0) = V(0x), the final velocity also has a horizontal component since the ball it's at a point of trajectory, V(e) = V(ef). No forces act in the horizontal direction so the momentum of the ball in this direction is conserved, hence, V(0) = V(e)

Therefore, h(e) = h(0) = 2.63m

You might be interested in
How do cells maintain homeostasis
Vikki [24]

Answer:

because they become home for them when they are in there for such a along time

5 0
3 years ago
A 300 kg piano needs to be moved to the other side of the room. The maximum static frictional force is equal to 90 N and the kin
riadik2000 [5.3K]

Answer:

a = 0.1 m/s²

Explanation:

  • If the maximum static frictional force is 90 N, this means that any applied force that will overcome this force, will cause the piano to slide, so kinetic frictional force applies.
  • Under these conditions, the net force in the horizontal direction is just the difference between the applied force (which is larger that the static friction force) and the kinetic frictional force, as follows:

       F_{net}  = F_{app} -F_{frk}  = 100 N - 70 N = 30 N (1)

  • By the same token, according Newton's 2nd Law, this force is just equal to the product of the mass of the piano, times the acceleration, as follows:

       F_{net} = m* a = 300 Kg * a = 30 N (2)

  • Solving for a:

        a = \frac{F_{net}}{m} = \frac{30 N}{300kg} = 0.1 m/s2 (3)

5 0
3 years ago
An iron railroad rail is 800 ft long when the temperature is 31°C. What is its length (in ft) when the temperature is −17°C?
natta225 [31]

Answer:

799.54 ft

Explanation:

Linear thermal expansion is:

ΔL = α L₀ ΔT

where ΔL is the change in length,

α is the linear thermal expansion coefficient,

L₀ is the original length,

and ΔT is the change in temperature.

Given:

α = 1.2×10⁻⁵ / °C

L₀ = 800 ft

ΔT = -17°C − 31°C = -48°C

Find: ΔL

ΔL = (1.2×10⁻⁵ / °C) (800 ft) (-48°C)

ΔL = -0.4608

Rounded to two significant figures, the change in length is -0.46 ft.

Therefore, the final length is approximately 800 ft − 0.46 ft = 799.54 ft.

7 0
3 years ago
What are two examples of common units for each of the above measurements
kap26 [50]

Density: g/mL, kg/cubic meter  

Volume: L, teaspoon  

Mass: g, MeV/sq. C

3 0
3 years ago
A little girl kicks a soccer ball, it goes 10 feet then comes back to her, how is this possible??
kirza4 [7]
Its gravitational force

7 0
3 years ago
Other questions:
  • Which is the correct scientific notation for 724,000,000,000?
    12·1 answer
  • The driver of a 1,000 kg car travelling at a speed of 16.7 m/s applies the car's brakes when he sees a red light. the car's brak
    13·2 answers
  • What is the difference between the velocity and the speed of an object?
    6·2 answers
  • A space transportation vehicle releases a 470-kg communications satellite while in a circular orbit 350 km above the surface of
    7·1 answer
  • An electric hoist does 500 joules of work lifting a crate 2 meters. How
    13·1 answer
  • A lamina occupies the part of the disk x2 + y2 ≤ 49 in the first quadrant. Find the center of mass of the lamina if the density
    5·1 answer
  • The flow of air from an ocean or lake to the land is called a ___________________________.
    6·1 answer
  • Based on information from the graph above, what can be concluded about the relationship between the temperature of a solvent and
    13·1 answer
  • PLEASE HELP ASAP<br>Explain how can a ripple tank be used to view wave pattern.
    10·1 answer
  • A stone is dropped from a high cliff vertically. After 6
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!