1st Law
If a book is resting on a table and no one touches it, what will happen to the book according to Newton's First Law of Motion?
a) It will start moving by itself.
b) It will stay at rest.
c) It will disappear.
d) It will float in the air.
b) It will stay at rest.
If you push a toy car with more force, what will happen to its acceleration according to Newton's Second Law of Motion?
a) The acceleration will decrease.
b) The acceleration will stay the same.
c) The acceleration will increase.
d) The car will stop moving.
c) The acceleration will increase.
If you push a wall with a force of 10 N, what is the force the wall exerts on you according to Newton's Third Law of Motion?
a) 0 N
b) 5 N
c) 10 N
d) 20 N
c) 10 N
A soccer ball is rolling across a field at a constant speed. According to Newton's First Law of Motion, what will happen to the ball if no external forces act on it?
a) It will slow down and stop eventually.
b) It will keep rolling at the same speed forever.
c) It will speed up on its own.
d) It will change direction randomly.
b) It will keep rolling at the same speed forever.
A person moves two boxes on a frictionless surface using a force of 50 N for both. Box A has a mass of 5 kg, and Box B has a mass of 10 kg. According to Newton's Second Law of Motion, which statement best explains the relationship between their accelerations?
a) Box A will accelerate twice as fast as Box B because it has half the mass.
b) Both boxes will accelerate at the same rate because the same force is applied.
c) Box B will accelerate twice as fast as Box A because it has more mass.
d) Neither box will accelerate because the force is balanced by their mass.
a) Box A will acceleration twice as fast as Box B because it has half the mass.
A rocket in space expels gas out of its engines at a high speed to generate thrust. According to Newton's Third Law of Motion, which of the following best explains how the rocket moves forward despite the absence of an external force in space?
a) The rocket moves forward because the gas molecules are pushed in the opposite direction, and the rocket experiences an equal and opposite force that propels it forward.
b) The rocket moves forward because the engine generates a constant force that pushes against the gravitational field of space.
c) The rocket moves forward due to the friction between the expelled gas and space, despite the vacuum.
d) The rocket moves forward because it creates its own gravitational force, which pushes it in the opposite direction of the expelled gas.
a) The rocket moves forward because the gas molecules are pushed in the opposite direction, and the rocket experience an equal and opposite force that propels it forward.
A hockey puck slides across a frictionless ice surface after being hit. According to Newton's First Law of Motion, which of the following explains why the puck stops despite the law predicting continuous motion?
a) Newton's First Law is incorrect in real-life conditions.
b) External forces like friction and air resistance act on the puck, opposing its motion.
c) The puck loses energy on its own over time.
d) The initial force that set the puck in motion gradually diminishes.
b) External forces like friction and air resistance act on the puck, opposing its motion.
A 1000 kg car and a 2000 kg truck are traveling on a flat road. Both vehicles apply the same braking force of 5000N to stop. According to Newton’s Second Law of Motion, which of the following is true about their motion during braking?
a) The car and the truck will decelerate at the same rate because the force is the same.
b) The truck will take twice as long to stop as the car because it has twice the mass.
c) The car will take longer to stop because it has less mass, resulting in greater acceleration.
d) The truck will stop faster because the braking force is more effective on larger masses.
b) The truck will take twice as long to stop as the car because it has twice the mass.
A swimmer pushes against the wall of a pool to propel herself forward. According to Newton's Third Law, which statement is true?
a) The swimmer's force on the wall is equal to the wall's force on the swimmer, but in opposite directions.
b) The swimmer's force on the wall is greater than the wall’s force on the swimmer.
c) The swimmer moves forward because the wall exerts a greater force than the swimmer’s push.
d) The swimmer does not move because the forces cancel each other out.
a) The swimmers force on the wall is equal to the wall's force on the swimmer, but in opposite directions.
A 5 kg box is placed on a surface. A constant force of 10 N is used to move the box, but it does not move. Which statement best explains this situation in light of Newton's First Law of Motion?
a) The applied force is not enough to overcome the box's inertia.
b) The box is in equilibrium because the net force on it is zero.
c) The box remains at rest because inertia prevents any motion.
d) The box does not move because it lacks an unbalanced force to overcome friction.
d) The box does not move because it lacks an unbalanced force to overcome friction.
A 1500 kg car is traveling at a constant velocity of 20 m/s. The driver hits the brakes, and the car experiences a braking force of 6000 N. According to Newton’s Second Law of Motion, which of the following statements correctly describes the car’s motion during braking?
a) The car will accelerate at a rate of 4 m/s² because the braking force is greater than the car’s weight.
b) The car will decelerate at a rate of 4 m/s² because the net force acting on it is 6000 N
c) The car will decelerate at a rate of 0.4 m/s² because the braking force is constant and the car’s mass is large.
d) The car will decelerate at a rate of 2.5 m/s² because the braking force only affects the car's speed in a linear manner.
b) The car will decelerate at a rate of 4m/s² because the net force acting on it is 6000 N
A person jumps off a boat into the water. According to Newton's Third Law, how does the boat react to the person’s jump?
a) The boat moves in the same direction as the person because the forces are equal and opposite.
b) The boat moves in the opposite direction to the person, since the force the person exerts on the boat has an equal magnitude but opposite direction.
c) The boat stays still because the person’s jump has no effect on the boat.
d) The boat accelerates downward because of the person’s jump.
b) The boat moves in the opposite direction to the person, since the force the person exerts on the boat has an equal magnitude but opposite direction
A ball is floating in deep space, away from any other external forces. Suddenly, an identical ball collides with it at a constant speed and bounces off in the opposite direction. According to Newton's First Law of Motion, which of the following statements about the original ball’s motion is correct?
a) The ball will remain stationary after the collision because it has no force acting on it.
b) The ball will move in the direction of the second ball's initial motion, with its speed depending on the energy of the collision.
c) The ball will remain at rest because Newton's First Law only applies when objects are not disturbed.
d) The ball’s motion will depend entirely on how much force the second ball exerts during the collision.
b) The ball will move in the direction of the second ball's initial motion, with its speed depending on the energy of the collision.
A 1000 kg car and a 2000 kg truck are both moving at a constant velocity of 25 m/s on a flat, frictionless surface. The car and the truck both apply the same braking force . Which of the following statements best describes the relationship between the deceleration of the car and the truck, and the time each takes to come to a complete stop?
a) Both the car and the truck will come to a stop at the same time, because the same force is applied to both.
b) The car will slow down twice as quickly as the truck, and it would stop in half the time.
c) The truck will decelerate slower than the car, but it will stop in the same time as the car due to its larger mass.
d) The car will decelerate faster than the truck, but the truck will stop in half the time due to its greater mass.
b) The car will slow down twice as quickly as the truck, and it would stop in half the time.
Two ice skaters, Skater A and Skater B, are on a frictionless ice rink. Skater A pushes Skater B. According to Newton’s Third Law, which of the following is true about the forces they experience?
a) Skater A experiences a smaller force than Skater B because Skater B is being pushed.
b) Skater B experiences a larger force because Skater A initiated the push.
c) Both skaters experience forces of equal magnitude but in opposite directions.
d) Only Skater B experiences a force because Skater A is applying it.
c) Both skaters experience forces of equal magnitude but in opposite directions.