SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Why do toy cars move?
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Which type of battery lasts the longest?
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Where can magnets be purchased?
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Do balls roll faster on rough or smooth surfaces?
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Detailed explanation-1: -5: Is there gravity in space? 6: What do magnets have to do with force and motion? 7: What is stronger, gravity or friction? 8: Does the sun have gravity?
Detailed explanation-2: -The motion of the object is changing The mass of the object is changing. The object continues moving in a straight line The object remains at rest.
Detailed explanation-3: -Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force.
Detailed explanation-4: -What can a force change? What unit is force measured in? When an object is in motion, what direction does friction act in? What are balanced forces? What causes ‘changing motion’? What is Newton’s Second Law? Which statement best describes weight? What unit is weight measured in?