Newton s Laws of Motion Directions: Use the following website and our science books to answer the questions on Newton s Laws of Motion. http://www.engineeringinteract.org/resources/parkworldplot/flash/concepts/balancedandun.htm What are Newton s 3 Laws of Motion? (Use Book) 1. 2. 3. Bumper Car (Use website) Slide 1 The bumper car is not up, slowing down or changing. All the forces are on it The bumper car has a weight which is due to. Because the forces are balanced, there must also be an force up from the floor to the weight. Slide 2 Draw the picture with the forces on it from the website. What will happen if this red bumper car hits the blue on head on? Will the blue car move to the left or to the right? Explanation: When the blue car is hit, the forces become. This causes the blue car to move to the. What Law of Motion does this example represent?
Tower Drop Slide 3 forces make objects speed up, slow down or change directions. In this tower drop ride, the lift is held up by a rope. Are the forces balanced at the moment? Explanation: The forces are, the lift speeding up, slowing down or changing direction. If the force in the rope is increased, will the lift go up, down or stay still? Explanation: The force pulling the lift is than the lift s weight, so the lift starts to move. Draw the picture with the forces on it from the website. If the rope is released so that there is no stretching force in the rope, will the lift go up, down or stay still? Explanation: The lift s weight is now, so the lift starts to move. Slide 4 There is another force acting on the lift as it falls:. The air resistance is much smaller than the lift s weight, so it doesn t slow the lift down much. Think about the air resistance of a parachute. Will the lift drop slower or faster than the parachute? Explanation: The parachute has more. This the parachute more.
What Law of Motion does this example represent? Log Jump Splash Slide 5 This boat is floating in the water. Are the forces balanced? Explanation: The forces are, the boat speeding up, slowing down or changing direction. Draw the picture with the forces on it from the website. If someone jumped into the boat, what would happen? Explanation: The forces become and the boat goes, but we don t know whether it will. What Law of Motion does this example represent? Summary If the forces on an object are balanced, the object will not be moving or will be moving with a speed that changing. If the forces on an object balanced, it will speed up, slow down or change direction. An object on a surface has a weight that acts downwards. The surface has another force acting on the object to balance it.
ANSWER KEY Newton s Laws of Motion Directions: Use the following website and our science books to answer the questions on Newton s Laws of Motion. http://www.engineeringinteract.org/resources/parkworldplot/flash/concepts/balancedandun.htm What are Newton s 3 Laws of Motion? (Use Book) 1. 2. 3. Bumper Car (Use website) Slide 1 The bumper car is not speeding up, slowing down or changing direction. All the forces are balance on it The bumper car has a weight which is force due to gravity. Because the forces are balanced, there must also be an equal force pushing up from the floor to balance the weight. Slide 2 What will happen if this red bumper car hits the blue on head on? Will the blue car move to the left or to the right? Right
Explanation: When the blue car is hit, the forces become unbalanced. This causes the blue car to move to the right. Tower Drop Slide 3 Unbalanced forces make objects speed up, slow down or change directions. In this tower drop ride, the lift is held up by a rope. Are the forces balanced at the moment? Yes Explanation: The forces are balanced, the lift is not speeding up, slowing down or changing direction. If the force in the rope is increased, will the lift go up, down or stay still? Up Explanation: The force pulling the lift up is larger than the lift s weight, so the lift starts to move upwards. If the rope is released so that there is no stretching force in the rope, will the lift go up, down or stay still? Down Explanation: The lift s weight is not balanced now, so the lift starts to move down. Slide 4 There is another force acting on the lift as it falls: air resistance. The air resistance is much smaller than the lift s weight, so it doesn t slow the lift down much. Think about the air resistance of a parachute. Will the lift drop slower or faster than the parachute? Faster
Explanation: The parachute has more air resistance. This slows the parachute down more. Log Jump Splash Slide 5 This boat is floating in the water. Are the forces balanced? Yes Explanation: The forces are balanced, the boat is not speeding up, slowing down or changing direction. If someone jumped into the boat, what would happen? Boat would get lower in the water. Explanation: The forces become unbalanced and the boat goes down, but we don t know whether it will sink or not. Summary If the forces on an object are balanced, the object will not be moving or will be moving with a speed that is not changing. If the forces on an object are not balanced, it will speed up, slow down or change direction. An object on a surface has a weight that acts downwards. The surface has another force acting upwards on the object to balance it.