There is regular international exchange of TV programmes as well. Television is also developing rapidly in our country. New radio stations are being built and equipped with the most modern instruments. Moderen means of radio engineering cover the greater part of the globe with long, medium and ultra-short radio waves. In the modern world, radio and television play an important role as a mass media of information and as a means of people’s political and cultural education. We have become so used to these means of communication that we can’t imagine our life without all this. Great progress has been made in radio engineering, radio communications, radio broadcastings and television since that time. More than ninety years passed sinse the day when the Russian scientist Alexander Popov demonstrated his “storm indicator” which was the prototype of modern radio receivers. What force acts on the crate during this time? Assume that the crate does not slide on the truck bed. The driver applies the brakes and slows to a speed v of 62 km/h in 17 s. A crate whose mass m is 360 kg rests on the bed of a truck that is moving at a speed v0 of 120 km/h, as in Fig.
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