Chapter 3 Review
Q: What happens when an object accelerates Q: What happens when an object accelerates? A) only its speed changes B) only its direction changes C) its speed or direction do not change D) its speed and direction change
Q: What happens when an object accelerates Q: What happens when an object accelerates? D) its speed and direction change Acceleration is defined as any change in speed or direction of an object.
Q: Besides a strength or magnitude, what does every force have Q: Besides a strength or magnitude, what does every force have? A) gravity B) direction C) friction D) magnetism
Q: Besides a strength or magnitude, what does every force have Q: Besides a strength or magnitude, what does every force have? B) direction Force is always acting in a certain direction.
Q: If you drop a brick and a feather in a container with no air, what will happen?
Q: If you drop a brick and a feather in a container with no air, what will happen? A: They will both fall at the same rate and hit the ground at the same time. Remember, if there is no air then there is no air resistance acting on an object. The air resistance is what causes objects to fall at different rates.
Q: What happens when balanced forces are applied to a moving object Q: What happens when balanced forces are applied to a moving object? A) the object stops moving B) the object moves faster in the same direction C) the object moves slower in the same direction D) the object keeps moving at the same speed and in the same direction
Q: What happens when balanced forces are applied to a moving object Q: What happens when balanced forces are applied to a moving object? D) the object keeps moving at the same speed and in the same direction When balanced forces act on an object there is no change in speed or direction.
Q: In a game of tug-of-war what happens when forces exerted by Team A and Team B are balance? A) Team A wins B) Team B wins C) neither team wins D) both teams pull the rope in the same direction
Q: In a game of tug-of-war what happens when forces exerted by Team A and Team B are balance? C) neither team wins Remember, when balanced forces act on an object there is no change in speed or direction. Neither team in this scenario will move so no one will win.
Q: When you ride in a roller coaster, what makes your body rise out of your seat at the top of a hill?
Q: When you ride in a roller coaster, what makes your body rise out of your seat at the top of a hill? Inertia Inertia is when an object resists any change in motion.
Q: What happens when you plug a fan in and turn it on Q: What happens when you plug a fan in and turn it on? A) mechanical energy becomes electrical energy B) electrical energy becomes heat C) electrical energy becomes mechanical energy D) electrical energy becomes light energy
Q: What happens when you plug a fan in and turn it on Q: What happens when you plug a fan in and turn it on? C) electrical energy becomes mechanical energy The electricity flows into the fan from the plug which turns into mechanical energy, turning the fan on.
Q: What affects the size and shape of an objects shadow?
Q: What affects the size and shape of an objects shadow Q: What affects the size and shape of an objects shadow? Changes in the position of the object relative to the light source. When the light source is closer to the object the shadow gets bigger and when it is father it gets smaller. Also, the position of a shadow will change as the sun changes position in the sky.
Q: You are building a wooden car to enter in a down hill race Q: You are building a wooden car to enter in a down hill race. What can you do to make a car go as fast as possible?
Q: You are building a wooden car to enter in a down hill race Q: You are building a wooden car to enter in a down hill race. What can you do to make a car go as fast as possible? You could add more weight to increase the acceleration. You could also give the car a smaller, smoother shape to reduce air resistance.
Q: Which types of energy are involved in pole vaulting?
Q: Which types of energy are involved in pole vaulting. Explain Q: Which types of energy are involved in pole vaulting? Explain. Gravitational potential energy – the pole vaulter is off the ground and has gravitational potential energy Elastic potential energy – the pole is bent and has elastic potential energy Kinetic energy – the pole vaulter is moving.
Q: On a roller coaster ride, the car has the most potential energy A) at the bottom of a hill B) halfway up a hill C) at the top of a hill D) halfway down a hill
Q: On a roller coaster ride, the car has the most potential energy C) at the top of a hill
Q: What happens to a shadow as an object gets closer to a light source?
Q: What happens to an objects shadow when the object gets closer to a light source? The shadow gets larger
Q: A giraffe runs about 4,980 meters in 6 minutes Q: A giraffe runs about 4,980 meters in 6 minutes. What is the giraffes average speed?
Q: A giraffe runs about 4,980 meters in 6 minutes Q: A giraffe runs about 4,980 meters in 6 minutes. What is the giraffes average speed? 4,980 meters = 830 m/min 6 minutes Speed = distance time
Q: A drummer hits a drum with a drumstick Q: A drummer hits a drum with a drumstick. The drumstick exerts a force on the drum. The reaction A) changes the direction of the drumstick B) drives the drum forward C) is stronger than action D) creates inertia
Q: A drummer hits a drum with a drumstick Q: A drummer hits a drum with a drumstick. The drumstick exerts a force on the drum. The reaction A) changes the direction of the drumstick Newton’s third law – for every action there is an equal and opposite reaction
Q: Which Law? Force = mass x acceleration
Q: Which Law? Force = mass x acceleration second law
Q: Which Law? An object in motion stays in motion, an object at rest stays at rest unless an unbalanced force is acted on it
Q: Which Law? An object in motion stays in motion, an object at rest stays at rest unless an unbalanced force is acted on it first law This law is also known as the law of inertia.
Q: Which Law? For every action there is an equal and opposite reaction.
Q: Which Law. For every action there is an equal and opposite reaction Q: Which Law? For every action there is an equal and opposite reaction. Third law
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? A pitched baseball goes faster than one that is gently thrown.
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? A pitched baseball goes faster than one that is gently thrown. Second law F = m x a
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? A swimmer pushes water back with her arms, but her body moves forward
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? A swimmer pushes water back with her arms, but her body moves forward third law for an action, opposite and equal reaction
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? A little girl who has been pulling her sled through the snow is crying because when she stopped to tie her shoe, the sled kept going and hit her in the back of the leg.
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? A little girl who has been pulling her sled through the snow is crying because when she stopped to tie her shoe, the sled kept going and hit her in the back of the leg. First law an object in motion will stay in motion
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? As the fuel in a rocket ignites, the force of the gas expansion pushes out the back of the rocket and pushes the rocket forward.
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? As the fuel in a rocket ignites, the force of the gas expansion pushes out the back of the rocket and pushes the rocket forward. Third law action/reaction
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? When you are standing up in a train and the train suddenly stops, your body continues to go forward.
Q: Which of Newton’s laws in explained in the scenario Q: Which of Newton’s laws in explained in the scenario? When you are standing up in a train and the train suddenly stops, your body continues to go forward. First law law of inertia