Compared to its mass on Earth, the mass of a 10-kg object on the moon is (the same/more/less).
What is the same? (mass is the same - weight is less)
100
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, this is the speed of the ball when it is caught.
What is the same as the speed it had when thrown upwards?
100
Accelerations are produced by these.
What are forces?
100
This is defined at force times distance.
What is work?
100
The impulse acting on an object is equalt to a change in this.
What is momentum?
200
This force always acts opposite an object's motion.
What is friction?
200
When a basketball player jumps to make a shot, this is the jumper's acceleration once he/she leaves the ground.
What is gravity (g) - no more, no less?
200
This law states that F=ma.
What is Newton's 2nd Law?
200
This is the type of energy an object has because of its location.
What is potential energy?
200
Momentum of a system is conserved only when this is true.
What is there is no net external force acting on the system?
300
A feather or a coin- this is the object that will hit the ground first if dropped from the same height in a vacuum.
What is neither? They would reach the ground at the same time.
300
The horizontal and vertical components of a projectile's velocity are __________ of one another.
What is independent?
300
This law states that an object will maintain its state of motion (whether at rest, or in motion) unless acted upon by another force.
What is the law of inertia?
300
An arrow in a bow has 70 J of potential energy. Assuming no loss of energy to heat, this is how much kinetic energy the arrow will have after it has been shot.
What is 70 J?
300
Padded dashboards are used in cars to increase this quantity of the collision.
What is time?
400
This is a physical quantity that has both magnitude and direction.
What is a vector?
400
A cannonball is launched horizontally from a tower. If the cannon has a barrel velocity of 60 m/s, how far will the cannonball be downrange (horizontal) 1 secon later?
What is 60 m downrange?
400
This law states that whenever an object exerts a force on another object, the second object always exerts a force of the same magnitude but in the opposite direction to that of the first object.
What is Newton's 3rd Law?
400
A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of work, but different amounts of this.
What is power?
400
A 2 kg ball is thrown at 3 m/s. What is the ball's momentum?
What 6 kg m/s?
500
A biker travels at an average speed of 10 m/s along a 300 m straight segment of a bike path. How much does the biker take to travel this segment?
What is 30 s?
500
A package falls out of a helicopter that is traveling horizontally at 70.0 m/s. It falls into the water below 8.0 seconds later. What is the horizontal distance it travels while falling?
What is 560 m?
500
A girl pulls on a 10 kg wagon with a constant force of 20 N. What is the wagon's acceleration?
What is 2 m/s^2?
500
Simple machines ideally work on the principle that W(in) = this?
What is work (out)?
500
What is the average momentum of a 50 kg skateboarder who covers 400 m in 50 s?