Answer:
In the first experiment, the mass is inertial mass and in the second experiment, the mass is a gravitational mass.
Explanation:
It is given that a student performs two types of experiment to see how change in its resistance while in the state of motion and in rest.
In the first experiment, an object is pushed with a force against a horizontal surface and the speed is measured using a sensor. Here, work is done against the inertia of the object as it is pushed from rest. So the mass is inertial mass.
In the second experiment, an object is pushed or thrown upwards with a force and speed is measured. Here, the mass is gravitational mass as the work done in the second experiment is against the gravity or against the weight of the object.
Answer:
567.321nm
Explanation:
See attached handwritten document for more details
Answer:
Design explained below
Explanation:
We are designing a link which is able to sustain 3500 N force because it will automatically sustain any lower force.
The tensile strength of AISI 1040 steel is : 585 MPa
Shear Strength = 338.15 MPa from data book
Now, 585 * 10^6 = 3500 / [Area]
(from pressure = force / area)
So, area = 5.98*10^-6= pi / 4 * d^2
So, diameter = 2.76 mm
Also, 338.15 *10^6 = 3500 / (pi * d * L)
So, L = 37.5 mm
Answer: 7.07 m/s
Explanation:
Mass of runner = 60 kg runner
Kinetic energy = 1500J
Speed of runner = ?
Recall that kinetic energy is the energy possessed by a moving object, and it depends on its mass and speed by which it moves.
Hence, K.E = 1/2 x mass x (speed)^2
1500J = 1/2 x 60kg x (speed)^2
1500J = 30kg x (speed)^2
(speed)^2 = 1500J/30kg
(speed)^2 = 50
To get the value of speed, find the square root of 50
speed = √50
speed = 7.07 m/s
Thus, the runner moves as fast as 7.07 m/s
Answer:
Digital thermometers are more reliable in the modern world today.
Explanation:
Digital thermometers provide faster results. Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature.