Motion and Forces Test
Quiz by Hai
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20 questions
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- Q1Stew studies for his exam for such a long time that he falls asleep standing up. Stew pushes straight down on the floor with 150 pounds of force due to gravity and he does not move, as he is sound asleep.The floor force pushes in the same direction as Stew's feet.The floor pushes straight up and to the right on Stew's feet.The floor pushes straight up on Stew's feet.The floor pushes down on Stew's feet.30s
- Q2In some special cases, action forces do not have corresponding reaction forces.TrueFalse30s
- Q3A student drops his text book out of a second story window. Why does it fall to the ground? (choose all that apply)There is a strong magnetic force between the book and the ground.the drag force of the air pulls it downThe net force acting on the book by gravity is downward30s
- Q4The force that holds the planets in orbit around the sun is calledtensionmagneticgravityfriction30s
- Q5Which of the following best describes what happens to the force of attraction if the distance between two objects is increased?It stays the sameIt decreasesIt increasesIt varies30s
- Q630s
- Q7What is the unit for forceJulesSpeedNewtonMeters30s
- Q8An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.Newton's Third LawInertiaNewton's Second LawNewton's First Law30s
- Q9For every action there is an equal and opposite reactionNewton's Second LawInteriaNewton's First LawNewton's Third Law30s
- Q10The acceleration of an object is proportional to the force acting on it and inversely proportional to its mass. Force = mass x accelerationInertiaNewton's 2nd LawNewton's 1st LawNewton's 3rd Law30s
- Q11the tendency of an object to resist any change in its motionInertiaNewton's Second LawNewton's Third Law30s
- Q12Speed measurements are given in units ofdistance/time²time²/distancetime/distancedistance/time30s
- Q13Measurements of acceleration are given in units oftime/distancetime²/distancedistance/timedistance/time²30s
- Q14How many centimeters are in a kilometer?100,0001,000100,000,00010030s
- Q15A rider finishes a 90 km bicycle trip in 3 hours. The average speed of the rider is270 km/hr30 km/hr180 km/hr.3 km/hr30s