Mechanics questions | form five Physics

Find both graphically and by calculating, the horizontal and vertical components of a force of 50N which is acting at 40° to the horizontal.

Answer / Solution

UNSOLVED

The horizontal and vertical components of a force are respectively 20 N and 30 N. Calculate the magnitude and direction of the force.

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UNSOLVED

Raindrops of mass fall vertically in still air with a uniform speed of 3ms^-1.If such drops are falling when a wind is blowing with a speed of 2ms^-1, what is the angle which the paths of the drops make with the vertical ? What is the kinetic energy of a drop?

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UNSOLVED

A ship initially at rest accelerates steadily on a perfect smooth sea. How would you attempt to estimate the value of the acceleration from within the ship? You cannot see out, but you have available all the apparatus normally found in a school laboratory.(You may assume that the acceleration is not less than 1ms^-1.)

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UNSOLVED

A light string carrying a small bob of mass hangs from the roof of a moving vehicle.

1. What can be said about the motion of the vehicle if the string hangs vertically?
2. The vehicle moves in a horizontal straight line from left to right, with a constant acceleration of 2.0ms^-2.

1. Show in a sketch the forces acting on the bob
2. By resolving horizontally and vertically or by scale drawing , determine the angle which the string makes with the vertical.

100. The vehicle moves down an incline making an angle 30° with the horizontal with a constant acceleration of 3.0ms^-2. Determine the angle which the string makes with the vertical.

Answer / Solution

UNSOLVED