ap physics
posted by Elisabeth .
can you check my answers?
2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer?
more work is required to bring a fully loaded truck up to a given speed because it is doing more work since it is fully loaded.
5. a cart gains energy as it rolls down a hill. what is the force that does the work?
the force that does the work is the hill.
8. engergy of an object depends on the reference frame of the observer. explain why you agree or disagree? ( This one I don't understand)
10. you and a flight attendant toss a ball back and forth in an airplane flight. does the ke of the ball depend on the speed of the airplane?carfully explain your answer?
i got that the ke does depend on the speed of the plane because the faster the plane, the faster the ball will go.
13. you watch your friend take off in a jet plane and you comment on the kinetic energy she has acquired. but she says she has no such increse in kinetic enegery. who is correct?
i got that the friend was correct
Respond to this Question
Similar Questions

Physicscheck
can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? 
College Algebra
A truck driver traveled at an average speed of 55 miles per hour on a 200 mile trip to pick up a load of freight. On the return trip(with the truck fully loaded), the average speed was 40miles per hour. What was the average speed for … 
MATHS
A threetonne truck is allowed to have a gross mass (when fully loaded) of 7.5 tonnes. If it is carrying 0.5t of sand, 1.25t of brick and 4 bags of cement each weighing 40kg, what is the maximum extra mass which can still be placed … 
Maths
A truck is loaded with two different types of crates. When 20 of crate A and 25 of crate B are loaded, the truck’s 8 tonne capacity is reached. When 2 of crate A and 16 of crate B are loaded, the same capacity is reached. Calculate … 
statistics
Weights of a certain model of fully loades gravel trucks follow a normal distrbution with mean = 6.4 tons and standard deviation = 0.3 ton. Waht is the probability that a fully loaded truck of this model is a. less than 6 tons? 
math
An empty truck weighs 2000 kg. After the truck was loaded, freight made up 80% of the weight of the loaded truck. At the first stop one fourth of the freight was unloaded. What percent of the loaded truck's weight did the load make … 
MaTh
An empty truck weighs 2000 kg. After the truck was loaded, freight made up 80% of the weight of the loaded truck. At the first stop one fourth of the freight was unloaded. What percent of the loaded truck's weight did the load make … 
Physics
15. A refrigerator weighing 1500 N is to be lifted onto a truck bed that is 1.0 m above the ground. When pushed up a slanting ramp 2.0 m in length a force parallel to the ramp of only 800 N is required to move it at constant velocity. … 
Physics
A spring loaded ballistic pendulum gun requires an increasing force to load. When loading a ball of mass 0.054 kg, the spring is compressed 7.00 cm, the gun is fully loaded, and the force required is 70.0 N. a) Calculate the work required … 
math
⦁ Three boxes weighing 128 pounds each and one box weighing 254 pounds were loaded onto the back of an empty truck. A crate of apples was then loaded onto the same truck. If the total weight loaded onto the truck was 2,000 pounds, …