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
vagabundo [1.1K]
3 years ago
9

a 450 kg piano is being unloaded from a truck by rolling it down a ramp at 22 degree inclined . there is negligible friction and

the ramp is 11.5 m long . two workers slow the rate at which the piano moves by pushing with a combined force of 1420N parralel to the ramp . I f the piano starts fromm rest . how fast is it moving at the bottom???
Physics
1 answer:
mafiozo [28]3 years ago
6 0

To solve this problem we will apply the linear motion kinematic equations, and force related equations in Newton's second Law.

Our values are given by:

m = 450 kg

x = 11.5m

F = 1420 N

\theta = 22\°

Through equilibrium we know that the Force coming from the vertical weight component minus the Force exerted on the body must be equal to the total Force (Mass and acceleration). So,

\sum F = ma \\F_w sin(22) - F = ma\\(mg)sin(22) - F = ma\\(450)(9.8)sin(22) - 1420 = 450a\\a = 0.515 m/s^2

Applying the kinematic equations of motion in which the velocity is described by the change in acceleration and position we have

v_f^2 = v_i^2 + 2ax

v_f^2 = 0 + 2(0.515)(11.5)

v_f = 3.44 m/s

Therefore the Speed at the bottom is 3.44m/s

You might be interested in
A student pulls a 2.0-kg object to the left with a force of 30 N, while another student is pulling against the object in the opp
alex41 [277]

Answer:

5 m/s2, left

Explanation:

We can solve the problem by applying Newton's second law of motion, which  states that:

\sum F=ma

where:

\sum F is the net force acting on an object

m is the mass of the object

a is its acceleration

In this problem, we have:

\sum F=30 N - 20 N = 10 N (to the left) is the net force on the object

m = 2.0 kg is the mass

So, the acceleration is:

a=\frac{\sum F}{m}=\frac{10}{2.0}=5.0 m/s^2

in the same direction as the force (left).

5 0
3 years ago
What is amplitude, wavelength, and frequency?
krek1111 [17]
Wavelength- <span>distance between successive crests of a wave.

frequency- t</span><span>he rate at which something occurs or is repeated over time.

amplitude-</span><span> maximum extent of a vibration.</span>
6 0
3 years ago
Which situation is a result of human activities?
ch4aika [34]
B acid rain in an area kills fish in a lake
7 0
2 years ago
Select the correct answer.
Rina8888 [55]

Answer:

D

Explanation:

D

7 0
3 years ago
ASAP please!! <br>The force vectors on an aircraft are as shown. Find the net (resultant force).
ioda

Answer:

The magnitude of the net force is 5430N

Explanation:

I suggest to define the axes as aligned to the axis of the plane. This will require you to decompose only one vector, namely the Weight. We need two components of the W force: one in horizontal direction of the plane, the other perpendicular to it. Through a simple triangle argument you will se that the plane-horizontal component of W is

W_D=3600 N\cdot\sin 27^\circ=1634N

acting in the direction of the Drag, and the plane-perpendicular component is:

W_L=-3600N\cdot\cos 27^\circ=-3208N

with negative sign since it counteracts the Lift.

So the components of the netforce F are:

F_h=T-D-W_D=(8000-1000-1634)N=5366N\\F_v=L+W_L=(4100-3208)N=829N

The magnitude of the  net force is:

|F|=\sqrt{5366^2+829^2}N = 5430N


6 0
3 years ago
Other questions:
  • A 0.60-kg object is suspended from the ceiling at the end of a 2.0-m string. When pulled to the side and released, it has a spee
    8·1 answer
  • Can an object be in equilibrium if it is in motion?
    11·1 answer
  • Is a sugar crystal a mineral? Explain
    12·1 answer
  • Calcular la energía cinética de un cometa cuya masa es de 5×10 elevado a 31 kg y se mueve con velocidad de 216000km/h
    10·1 answer
  • Instruction
    14·1 answer
  • Wet sugar that contains one-fifth water by mass is conveyed through an evaporator in which 85% of the of the entering water is e
    12·1 answer
  • Describe the factors that cause static friction between two surfaces to increase.
    7·1 answer
  • A car with a mass of 650 kg is moving with a speed of 20m/s. Calculate the kinetic energy of the car?
    12·1 answer
  • A 57 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.1 m/s. The acceleration of
    15·1 answer
  • If Frequency F, velocity v, and density D are considered fundamental units, the dimensional formula for momentum will be :
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!