Question

pls help

Q1. When does a body have rotational motion?
Q2. Define moment of force. Write its SI unit.
Q3. Write the formula for finding moment of force.
Q4. Define pressure. Write its SI unit.
What are the factors on which pressure depends and how?​

Answer 1

Q1. When a body/an object move around a circular path In a fixed axis or orbit,it is said to be in rotational motion.
Q2. Moment of force is a measure of its tendency to cause a body to rotate about a specific point of axis. SI unit is Nm Newton meter.
Q3.moment of force=F x D. F=force. D=distance from axis
Q4.Pressure is the amount of force applied perpendicular to the surface of an object per unit area.
SI unit is Pa I.e Pascal.

Answer 2

Answer:

1)

When all parts of a rigid body move parallel to a fixed plane, then the motion of the object is referred to as plane motion. There are two types of plane motion, which are given as follows: 1. The pure rotational motion: The rigid body in such a motion rotates about a fixed axis that is perpendicular to a fixed plane.

2) In physics, moment of force (often just moment) is a measure of its tendency to cause a body to rotate about a specific point or axis. ... The SI unit for moment is the newton meter (kgm²/s²).

3) Moment of force = F x d

F is the force applied, d is the distance from the fixed axis, Moment of force is expressed in newton meter (Nm). Moment of force formula can be applied to calculate the moment of force for balanced as well as unbalanced forces.

4) Pressure is the amount of force applied perpendicular to the surface of an object per unit area and the for it is p (or P). The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2, or kg·m−1·s−2).

5) Pressure = Force/Area So, the pressure depends on force applied and the area on which force is acting. Answer: Pressure is defined as thrust per unit Area. It depends on mass of the object, acceleration of object, and area upon which force is acting.