Complete question is;
Jason works for a moving company. A 75 kg wooden crate is sitting on the wooden ramp of his truck; the ramp is angled at 11°.
What is the magnitude of the force, directed parallel to the ramp, that he needs to exert on the crate to get it to start moving UP the ramp?
Answer:
F = 501.5 N
Explanation:
We are given;
Mass of wooden crate; m = 75 kg
Angle of ramp; θ = 11°
Now, for the wooden crate to slide upwards, it means that the force of friction would be acting in an opposite to the slide along the inclined plane. Thus, the force will be given by;
F = mgsin θ + μmg cos θ
From online values, coefficient of friction between wooden surfaces is μ = 0.5
Thus;
F = (75 × 9.81 × sin 11) + (0.5 × 75 × 9.81 × cos 11)
F = 501.5 N
Answer:
Kinetic Theory states that pressure is not cause by molecule that push molecule to each other
Explanation:
Kinetic Theory
it is also known as kinetic molecular theory or the collision theory
Kinetic theory explain you property of gas such as
(1) pressure, (2) temperature, (3) volume
Kinetic Theory states that pressure is not cause by molecule that push molecule to each other and pressure is caused by molecule colliding with the each other and with the container
3 component of
kinetic theory are
-
when the molecules collide, there no energy is gain or lost
- In the gas molecule take approx negligible amount of space
- molecules are in constant and linear motion
Answer:
a) Her average speed was 0.778 km/min
b) Her average velocity was 0.572 km/min
Explanation:
a) The average speed is given by the traveled distance over time:
average speed = distance / time
average speed = 14.0 km / 18.0 min = 0.778 km/min
b) The average velocity is given by the displacement over time. It is calculated as the variation of the position over time relative to the frame of reference. In this case, the origin of the frame of reference is located at the home of the student. The final position will be the university. Then:
velocity = (final position - initial position)/ time
velocity = 10.3 km / 18.0 min = 0.572 km/min
Answer:
A-500 N
Explanation:
The computation of the tension in the chain is shown below
As we know that
F = ma
where
F denotes force
m denotes mass = 7
And, a denotes acceleration
Now for the acceleration we have to do the following calculations
The speed (v) of the hammer is
v = Angular speed × radius
where,
Angular seed = 2 × π ÷ Time Period
So, v = 2 × π × r ÷ P
v = 2 × 3.14 × 1.8 ÷ 1
= 11.304 m/s
Now
a = v^2 ÷ r
= 70.98912 m/s^2
Now the tension is
T = F = m × a
= 7 × 70.98912
= 496.92384 N
= 500 N
Answer:
the law of conservation of mass and the law of constant compositionthe law of conservation of mass and the law of constant composition
