Newton's Laws
Momentum
Circular Motion and Universal Gravitation
Kinetic Energy,Potential Energy, and Conservation of Energy
Work and Power
100
Newton's Laws all contain some combination of velocity, acceleration, time, and displacement. Which of these terms cannot be negative and why?
What is time. Time is a scalar and that means it has magnitude but not direction.
100
What is conserved in an inelastic collision?
What is momentum is conserved but kinetic energy is not conserved
100
True or false, is it possible for an object to have an acceleration when the velocity of the object is constant.
What is false
100
When a ball is rolling down a hill how is its KE changing in relation to its PE?
What is the KE is increasing as the PE of the ball is decreasing.
100
Is work being done when a weight lifter holds a 100 lbs dumbbell 0.25 m above his head?
What is no, work is not done.
200
An archer wants to shoot his arrow as far as he can in order to win the archery competition. What angle should he form with his bow in order for his arrow to travel the furthest?
What is 45 degrees
200
A 35.0 g bullet strikes a 5.0 kg block of wood sitting on top of a table. The bullet embeds itself in the block. The block with the embedded bulit fly off at a velocity of 8.6 m/s. Find the initial velocity of the bullet.
What is 1237.2 m/s.
200
The force of gravity is inversely proportional to the orbital radius in what equation.
What is Newton's Universal Law of gravitation.
200
If a projectile reaches a height of 180 km and has a mass of 83.8 kg What form of energy are we trying to find? given g= 9.81 m/s^2. Calculate this form of energy.
What is Potential Energy. What is 147974 J.
200
How can the work-kinetic energy theorem explain why the force of sliding friction reduces the kinetic energy of a particle?
What is the work done by friction is equal to the change in the mechanical energy. As a result, the particle slows down.
300
A small fish jumps out of a flying pelican's mouth that is rising steadily at .50 m/s. After 2.5 s what is the fish's velocity?
What is -24 m/s
300
Which has more momentum? A sports car traveling at 85 mph (37.9 m/s) with a mass of 2000 kg or A semi tuck traveling at 25 mph (11.2 m/s) with a mass of 6000 kg.
What is the sports car.
300
The gravitational force between two electrons is 5.42 x 10^-71 N. The distance between them is 1.0 m. Using Newton's Universal Law of Gravitation, what quantity are we solving for? What is the value of this constant?
What is the mass of the electron. What is 9.014 x 10^-31 kg.
300
A car is speeding down I-880 with a velocity of 29 m/s and a mass of 2000 kg. What form of Energy does this car have? How much energy will the car lose if it slows down to 10 m/s due to traffic?
What is Kinetic Energy. What is -741000 J.
300
How are energy, time, and power related?
What is power is equal to energy over time.
400
A large crate is placed on the bed of a truck but is not tied down. As the truck accelerates forward the crate slides across the bed until it hits the tailgate. Explain why this happens? If the driver slammed on his brakes what could happen to the crate?
What is inertia. The crate slides back to the end of the truck because it tries to stay at rest. When the driver slams on his breaks, the crate will slide up because it is still traveling at the velocity the truck was going. This is due to Newton's first law.
400
which type of collision has its kinetic energy conserved? Give an example of this type of collision.
What is a perfectly elastic collision. An example would be billiard balls or gas molecules.
400
Given the orbital radius of a planet is 4.50 x 10^12 m and the mass of the sun to be 1.99 x 10^30 kg. Solve for the period (calculate in years).
What is 165.1 years.
400
A person is parasailing at 22 m/s over Lake Tahoe when he drops his 0.34 kg camera. The person was 90 m above the water when he dropped his camera. What is the speed of the camera when it hits the water?
What is 47.4 m/s.
400
A 50.0 kg student climbs 5 m up a rope at a constant speed. If the student's power output is 200 W, how long would it take the student to climb the rope? How much work does the student do?
What is 12.3 s and 2.45 x 10^3 J of work?
500
give the definition of Newton's three laws
1.)What is originally in motion stays in motion unless acted upon by a force. A body at rest stays in rest unless acted upon by a force. 2.) F=ma force is equal to the mass times acceleration. 3.) every force applied to an object has an equal and opposite force applying back.
500
An 82-kg man and a 48-kg woman pair figure skating team are gliding across the ice at 7.4 m/s, preparing for a throw jump maneuver. The man tosses the woman forward with a speed of 8.6 m/s. Determine the speed of the man immediately after the throw.
What is 6.7 m/s
500
Given that Venus has a period of 225 Earth days and that Earth has an orbital radius to the Sun that is 1.50 x 10^11 m. Find the orbital radius between the sun and Venus. which law did you use to solve this problem?
What is 1.09 x 10^11 m. What is T(a)^2/ T(b)^2 set equal to r(a)^3/ r(b)^3.
500
A slingshot is used to launch a 62 kg dart. The spring constant of the slingshot is 3.0 x 10^4 N/m. If the elastic potential energy is 140 J before the dart was launched, how far did the dart travel after it was shot?
What is .0966 m
500
a student with a mass of 66 kg climbs a staircase in 44 seconds. If the distance between the base and the top of the staircase is 14 m, how much power will the student deliver by climbing the stairs?
What is 206 W
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