The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is? a) 968J b) 98J c) 1980J d) 450J

Q: Calculate the initial kinetic energy of a 1 tonne meteorite which hits the Earth at a velocity of 25…

A: Part (4):Given: The mass of the meteorite is 1 tonne. The speed of the meteorite is 25 km/s.

Q: Can you expend energy without doing any work? Given an example.

A:

Q: 5.) A skydiver, mass 60 kg, jumps out of an airplane traveling 65 m/s horizontally at an altitude of…

A: Work energy theorem will be applied here.

Q: ) How much work must be done on a heavy object to lower it from a height where it has 4000 J of GPE…

A:

Q: In 1990, Walter Arfeuille of Belgium lifted a 281.5 - kg object through a distance of 17.1cm using…

A: Given data:  Mass (m) = 281.5 kg Height (h) = 17.1 cm = 0.171 m The speed of the object is constant…

Q: 12) A 7.80 g bullet moving at 600 m/s penetrates a tree trunk to a depth of 6.0 cm. Using…

A:

Q: Frustrated by another death in the game Elden Ring, Ryan throws his game controller at a wall. When…

A: Given: The mass of the controller: m = 0.2 kg. The initial height of the controller (when Ryan lets…

Q: •P49 You throw a ball straight up, and it reaches a height of 20 m above your hand before falling…

A:

Q: A car slams on its brakes and slows down. The work done by the brakes on the car must be a)…

A: Let the mass of car = m Let the initial velocity = u Let the final velocity = v It is given that…

Q: A 69.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.9 m/s.…

A: The objective of this question is to calculate the kinetic energy of the athlete at the point when…

Q: 4) A block of 1 kg falls from a vertical cliff of height 100m. a) Calculate the velocity of the…

A: Hai, since there are multiple sub parts posted, we will answer the first three sub parts. (a) The…

Q: A 30-kg sledder goes down a 6.0 m high snowy slope from rest, hitting 7.0 m/s as she reaches the…

A: Change in kinetic energy is the difference of final and initial kinetic energy. Kinetic energy is…

Q: Jacob is riding his bike down a tall hill. At the top of the hill, he has 2800J of potential energy.…

A: Whether the total amount of energy at the top is equal to the total amount of energy at the bottom…

Q: A 0.2 kg ball is rest on edge of the top of a 1 m height table. Does the ball have kinetic energy?…

A: From the question it is given that:  Mass of ball: m = 0.2 kg  Height of table: 1m

Q: A car (m=1000 kg) is initially moving at a speed of 20 m/s (~45 mph) when the driver hits the brakes…

A: Work done is equal to change in kinetic energy W=∆EK=12mvf2-vi2=121000 kg0-20 ms2=-200000 J=-200 kJ

Q: 17) Under the influence of a fore, an object of mass 4 kg accelerates from 3 m/s to 6 m/s in 8…

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Q: A car accelerates from zero to a velocity v. Another car of indentical mass accelerates from zero to…

A: Given value--- A car accelerates from zero to a velocity v. Another car of indentical mass…

Q: Determine the speed of 74-kg Vinco after skiing down the hill to a height which is 43 meters below…

A: Given data: Mass of Vinco, m=74 kg Distance travelled down from the starting location, S=43 m

Q: 4) A block of 1 kg falls from a vertical cliff of height 100m. a) Calculate the velocity of the…

A: Given : Mass = 1kg Height = 100 m (a) Velocity before it hits ground : We know 3rd equation of…

Q: A cheetah can accelerate from rest to 7.4 m/s (about 18 m/h) in 1.8 seconds. How much average power…

A:

Q: 1) A 1622 kg car has a speed of 11.3 m/s when it hits a tree. The tree doesn’t move and the car…

A:

Q: What is kinetic energy (KE)? What is potential energy (PE)? Discuss their similarities and…

A: Kinetic energy is a category of energy used under the context of dynamics of motion. The energy…