Visitor activity

ji

Public contributions from visitors who posted under the name ji.

Questions 255
Answers 0

Recent questions

Latest questions from ji

A bird flies off of a cliff, dropping a feather and knocking rocks off the cliff. The rocks reach the ground much faster than the feather. Which energy transformations occur in this case? Check all that apply. All of the...
1 answer
A free body diagram with 4 force vectors. The first vector is pointing downward, labeled F Subscript g Baseline. The second is pointing right, labeled F Subscript p Baseline. The third vector is pointing upward, labeled...
1 answer
Which hypothesis could be used in a scientific experiment and possibly lead to more hypotheses and experimentation? If the amount of chocolate chips put into cookie increases, then the cookies will taste better, because...
1 answer
Suppose an object’s initial velocity is 10 m/s and its final velocity is 4 m/s. Mass is constant. What can best be concluded about the object based on the work-energy theorem? Work is positive, the environment did work o...
1 answer
A spring that has a spring constant of 1400 N/m is stretched to a length of 2.5 m. If the normal length of the spring is 1.0 m, how much elastic potential energy is stored in the spring? 700 J 1050 J 1575 J 4375 J
1 answer
If 3,600 J of work is done in 3.0 s, what is the power? 0.00083 W 1,200 W 3,600 W 11,000 W
1 answer
A bird flies off of a cliff, dropping a feather and knocking rocks off the cliff. The rocks reach the ground much faster than the feather. Which energy transformations occur in this case? Check all that apply. All of the...
1 answer
A moving company collects data about couches they move and displays the data in a table. The force along the ramp, the angle of the ramp, and the height the couch is raised from the ground to the platform is shown below....
1 answer
A vertical spring with a spring constant value of 4500 N/m is compressed 60 cm. A 5.5 kg pumpkin is placed on the end of the spring, and the spring is released. To the nearest whole number, the pumpkin will rise m.
1 answer
An 85 kg construction worker has 37,485 J of gravitational potential energy. To the nearest whole number, the worker is m above the ground.
1 answer
Four landing sites are proposed for a lander. Data about the sites are listed in the table. A 3 column table with 4 rows. The first column is labeled landing site with entries W, X, Y, Z. The second column is labeled hei...
1 answer
The table shows the mechanical energy and velocity of a rock that was thrown four times. The rock has a mass of 2.4 kg. During which trial was the rock the highest above the ground? 1 2 3 4
1 answer
Earth and all of the air in the atmosphere around it make up an incredibly complex system. Energy is constantly changing forms in many different ways. How would scientists most likely describe the system of the Earth in...
1 answer
To do work, this truck uses energy stored in chemical fuel and an electrical battery. An illustration of truck with a wide arrow away from it labeled input energy? J and it splits into 3 arrows labeled kinetic energy 400...
1 answer
Four different balls are moving at the same velocity. Which will have the greatest kinetic energy as it rolls? a golf ball a bowling ball a tennis ball a soccer ball
1 answer
Which energy transformation occurs after a skydiver reaches terminal velocity? Gravitational potential energy transforms into thermal energy. Gravitational potential energy transforms into kinetic energy. Kinetic energy...
1 answer
If a 4.5 kg object is dropped from a height of 6.0 m, what will be its velocity when it is halfway toward the ground? (Use g = 9.80 m/s2, and ignore air resistance.) 7.7 m/s 11 m/s 16 m/s 29 m/s
1 answer
A 60.0 kg object is moving east at 8.00 m/s, and then slows down to 4.00 m/s. How much work was done? –1,440 J –480 J 1,440 J 2,880 J
1 answer
An object has a mass of 15 kg and is accelerating to the right at 16.3 m/s2. The free-body diagram shows the horizontal forces acting on the object. A free body diagram with 2 forces. The first vector is pointing right,...
1 answer
According to Newton’s second law of motion, the acceleration of an object is inversely proportional to which quantity? velocity mass net force displacement
1 answer
Jerome places a bag of flour on a scale. The scale shows that the bag has a weight of 17 N. Which is the reaction force of the bag sitting on the scale? The scale exerts a 17 N force up on the bag. The scale exerts a 17...
1 answer
The acceleration due to gravity on Mercury is 3.7 m/s2, which is about six times the acceleration due to gravity on Pluto. Which statement accurately compares the mass and weight of an object on these two planets? An obj...
1 answer
A push broom is being pushed down across a rough floor. The broom moves to the right. A picture of a person standing pushing a broom downward at an angle to the right. There is a velocity vector below the head of the bro...
1 answer
An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object? 0.25 m/s2 4 m/s2 60 m/s2 100 m/s2
1 answer
The free-body diagram of a crate is shown. A free body diagram with 4 force vectors. The first vector is pointing downward, labeled F Subscript g Baseline = negative 440 N. The second vector is pointing right, labeled F...
1 answer

Recent answers

Latest answers from ji

No public answers found for this visitor name.