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3 years ago

What is the mechanical adventure of a machine with an input force of 63 pounds and an output force of 275 pounds?

Physics

1 answer:

madreJ [45]3 years ago

5 0

mech advantage = load/effort = 275/63=4 and a bit

mech adventure ???

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an empty propane tank dropped from a hot air balloon hits the ground with a speed of 143.8 m/s. from what height was the tank re

vodomira [7]

What you know:
Vi=0m/s
Vf=143.8m/s
A=-9.8m/s
d=???
Use the equation Vf^2=Vi^2+2A(d)
Rearrange to isolate d: d=Vf^2/2A
d=(143.8)^2/2(-9.8)
d=20678.4/-19.6
d=-1055m
The tank was released from a height of 1055m

8 0

3 years ago

3. Our favorite nature explorer Steve Irwin is currenty warking with crocodiles in the Nile River. One of the big boy crocs gets

xeze [42]

Answer:

K.E = 4800 Joules.

Explanation:

Given the following data;

Mass = 600 kg

Velocity = 4 m/s

To find the kinetic energy;

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

$K.E = \frac{1}{2}MV^{2}$

Where;

K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

Substituting into the equation, we have;

$K.E = \frac{1}{2}*600*4^{2}$

$K.E = 300 * 16$

K.E = 4800 Joules.

5 0

3 years ago

Consider a basketball player spinning a ball on the tip of a finger. If a player performs 1.99 J of work to set the ball spinnin

sladkih [1.3K]

Answer:

25.8 rad/s

Explanation:

C = circumference of the hollow sphere = 0.749 m

r = radius of the sphere

Circumference of the hollow sphere is given as

C = 2π r

0.749 = 2 (3.14) r

r = 0.12 m

m = mass of the basketball = 0.624 kg

Moment of inertia of basketball is given as

$I = \left ( \frac{2}{3} \right )mr^{2}$

$I = \left ( \frac{2}{3} \right )(0.624)(0.12)^{2}$

I = 5.99 x 10⁻³ kg-m²

w = angular speed

KE = Kinetic energy of the ball = 1.99 J

Kinetic energy of the ball is given as

KE = (0.5) I w²

1.99 = (0.5) (5.99 x 10⁻³) w²

w = 25.8 rad/s

5 0

3 years ago

The table shows results from an experiment in which objects made up of different materials are rubbed with each other. Based on

Anna [14]

Answer:

D) The rubber object will become negatively charged, and the glass object will become positively charged.

Explanation:

Electron affinity of rubber or glass will decide the thing that rubber will get the negative charge or the glass will get the negative charge

As we know that if the electron affinity of a given material is high then that material will not lose its electron while rubbing with some other material.

When we compare rubber and glass then we know that electron affinity of rubber is more as compare to glass.

So rubber will get negative charge when we rub it with glass

so correct answer will be

D) The rubber object will become negatively charged, and the glass object will become positively charged.

5 0

3 years ago

When we stretch a spring, which two factors affect how much elastic

sveta [45]

Mass and gravitational field

3 0

2 years ago