### Effort Required to Move the Body on an Inclined Plane

Effort Required to Move the Body Up an Inclined Plane

The effort (P) required to move the body up an inclined plane as shown in Fig. 1.20, is given by

where
W = Weight of the body,
Î± = Angle of inclination of the plane with the horizontal,
Î¸ = Angle which the line of action of P makes with the weight of the body W, and
Ï• = Angle of friction.

Notes :

1. When friction is neglected, then Ï• = 0, In that case,

2. When effort P is applied horizontally, then Î¸ = 90°. In that case

3. When effort P is applied parallel to the plane, then Î¸ = 90° + Î±. In that case,

Effort Required to Move the Body Down an Inclined Plane

The effort (P) required to Move the body down an inclined plane as shown in Fig. 1.21, is given by

Notes:
1. When friction is neglected, then Ï• = 0. In that case,

2. When effort is applied horizontally, then Î¸ = 90°. In That case,

3. When effort is applied parallel to the plane, then Î¸ = 90° + Î±. In that case,

Efficiency of an Inclined Plane

It is defined as the ratio of the effort required neglecting friction ( i.e. Po) to the effort required considering friction (i.e. P). Mathematically, efficiency of an inclined plane,

### Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below: Question: Which male engineers do you find more attractive as a husband? Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.” Which male engineers do you find more

### Engineering Mechanics - Introduction

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