![]() ![]() In this situation, the object moves along at the same speed and in the same direction. ![]() If the forces all balance each other, then the resultant force is zero. The resultant force is at an angle to the direction of movement - the object with change direction and moves in the direction of the force - it turns. Negative resultant force - the object will decelerate and slow down. Positive resultant force - the object will accelerate in the direction of the force and speed up. 50 N - 20 N gives a 30 N resultant force forwards. You produce a forward force from the pedals of 50 N, the friction from the road causes a 20 N force backwards. The resultant force is the overall effect these have on you and the bike, the various forces act as if they have been combined into one single force. There is gravity, pulling you down, there is the friction between the tyre and the road, there is the air resistance as you cycle along, there is the force from the pedals as you cycle. When you are riding a bike there are lots of different forces all acting on you and the bike at the same time. Turn the handlebars to corner, (you apply a force). Pull the brakes to slow down, ( you apply a force). Peddle faster to increase speed, (you apply a force). If you have ever ridden a bike, you already know all about Newton’s First Law of Motion. ![]() Objects do not move unless you push or pull them, once you get an object moving you need another force to speed it up, slow it down or to make it turn. It might sound confusing but it is really just common-sense. In his first law, he describes something we all know anyway. Sir Isaac Newton was one of the greatest scientists to study forces and motion. A moving object will remain at a constant velocity unless acted upon by a resultant force. Newtons Laws of Motion First Law of MotionĪn object will remain at rest unless acted upon by a resultant force. Triple: Light & the Electromagnetic Spectrum. ![]()
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