# Exercises on dynamic forces and static balance

Here is a series of exercises on dynamic forces and static balance

Exercise 1

How they should be arranged three forces with equal intensity to get a static balance ? (Click on the link at the bottom of the page for complete solutions or here)

Exercise 2

How they should be arranged four forces with equal intensity to have a static balance?

Exercise 3

What force you have to exercise to get a static balance if two forces are acting on a given body, the first northward of 20 N and the second to the East of 20 N

First law of Dynamics
Exercise 4

Several passengers of vehicles when they were buffered at the traffic lights so very violent from another car suffered serious neck injuries, explains why the principle of Dynamics, What measures have been taken to prevent such injuries?

Exercise 5

A famous experiment that everyone sooner or later we try is to be able to remove a tablecloth from a table set without dropping cutlery and plates without the latter move too. How is it that this happens? If we remove the tablecloth drag all the objects, because?

Exercise 6

Based on the principle of inertia is not necessary to apply a force to keep in motion a body. But then why is it necessary to keep the engine of a truck to keep it in motion even if the road is flat?

Exercise 7

An airplane of mass m = 30 x 103 kg travelling horizontally at a constant speed of v = 400 km/h. How much is the total force acting on the plane?

Second law of Dynamics

Exercise 8

A small truck is dead and is in need of repair. The three occupants decided to push it up the body shop located a few dozen meters ahead.
Commenting on the figure, highlighting the second law in Dynamics. Which of the three is really helping to arrive at your destination, because?

Exercise 9

A force F acting on a body of 1000 kg that accelerates with a = 15 m/s2. Calculates the intensity of the force.

Exercise 10

Explains what mass is greater than between a body impelled by a force of 108 N and an acceleration of 4 m/s2 and a body impelled by a force of 16,2 N with acceleration 0,6 m/s2 .

Exercise 11

A force of intensity 35 N acts on a ball of 5 kg initially in a State of rest. What is the acceleration of the ball? That speed reached after 4 seconds? How much space has come after 4s ?

Exercise 12

An object of 2 kilograms initially in a State of rest is submitted in conjunction with two forces. The first force to the right of 6 N and the second to the left of 4 N. Calculate the acceleration of the body.

Exercise 13

An object of 2 kg is subjected simultaneously to three horizontal forces. The first force to the right of 4 N, the second strength left 6 N and the third to unknown. Knowing that the body in question accelerates towards the right and that in 10 s travels 100 m starting from a State of rest calculates the value of strength missing.

Exercise 14

A piece of concrete 500 kg is pulled by rope from a crane with a force of 1500 N. Calculate the magnitude of the acceleration of the piece of concrete in the event that the friction force is nothing or acting a friction whose intensity and 700 N.

Exercise 15

A small-caliber bullet of mass accelerates with a = 10, 18 450 m/s2 in the gun barrel. Calculate the acceleration experienced by the rifle knowing that has a mass of 5,6 kg.