1) 4 m/s A cart starting from rest rolls down a hill and at the bottom has a speed of 4 m/s. If the cart were given an initial push, so its 2) 5 m/s 3) 6 m/s initial speed at the top of the hill was 3 m/s, what would be its speed at the bottom? 4) 7 m/s 5) 25 m/s

Q: A stone of mass 2kg is projected horizontally from the top of a cliff 500m high with a velocity if…

A:

Q: If a 0.50 kg ball is moving at a speed of 12 m/s what is the kinetic energy of the ball? Equation is…

A:

Q: The figure below shows to balls, analyse and evaluate the information given, to determine which of…

A: Given that: m1=900 g=0.9 kgm2=0.4 kgh1=300 cm=3 mh2=7 mg=9.8 m/s2

Q: A skateboarder with a mass of 90 kg is skating towards a ramp at 5 m/s. The skater begins to move up…

A: a) Lets apply energy conservation to solve this question:- Ei= Ef => Ki + Ui = Kf + Uf => 0.5…

Q: 1. A chain of length 0.7 m is at rest over two slopes, as shown in figure. First, assume there is no…

A: Given:- The length of the chain is L = 0.7 m   if there is no friction between the plane and the…

Q: A 3 kg pendulum bob on a string 5 m long is released with a velocity of 3 m/s when the support…

A: Given data: Mass (m) = 3 kg Length (L) = 5 m Initial velocity (u) = 3 m/s Angle (θ) = 25°, with the…

Q: 1) 2 v, = V2 %3D Car #1 has twice the mass of 2) 12 v, = V2 %3D car #2, but they both have the 3) 4…

A: Given data:  m1 = 2m2 KE1 = KE2 Required : Relationship between speeds of cars

Q: 4. Spheres A and B are dropped at the same time from a clff. Sphere B is dropped from twice the…

A:

Q: 7.) A 4kg mass is spun around in a horizontal circle on a table using a 0.3-m-long piece of string.…

A:

Q: B.E. of a satellite is 4×10³ J. Calculato its kinetic I energy potential energy.

A: To find-(1) K.E. =?(2) P.E.=?Given that-B.E.=4×108 J

Q: Which of the following bodies has the largest kinetic energy? Select one: a. Mass 2M and speed 3V b.…

A:

Q: km Calculate the kinetic energy of a 3.0x 10 kg airplane moving at a speed of 0.18 Round your answer…

A: Given data:  Mass (m) = 3.0×104 kg Speed (v) = 0.18 km/s = 180 m/s Required: The kinetic energy

Q: If all the items in the figure have the same mass,which two items will have the same gravitational…

A: Let mass of each object A, B, C, and D = m  The acceleration due to gravity = g ( for each object).…

Q: One Watt = ? A) 1 Joule/sec B) 1 erg/sec C) 1 Pascal/sec D) 1 m/s

A:

Q: An asteroid starts at rest infinitely far from Earth. The asteroid has a mass of 1.00×10ª kg.…

A: The work done by the Moon's gravitational field can be evaluated through the change in potential…

Q: 14) When an object is solely under the influence of gravitational force, the sum of its kinetic and…

A: The statement is (A) TRUE.

Q: An object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is A) 20 J B)…

A: Given data: Mass of the object is, m = 10 kg Speed of the object is, v = 2 m/s Formula used: The…

Q: A ball is thrown vertically upward in the air. While on its way up, it A. loses kinetic and gains…

A: three questions of kinematics.

Q: A 150kg roller coaster car rolls frictionlessly down a 30m tall hill. If the car was initially at…

A: Mass (m) = 150kg  Height (h) = 30m

Q: A skier starts to slide from the 20 m high ramp for the first time without speed and without…

A:

Q: 3-)Find the displacement, velocity, kinetic energy, potential energy and momentum of an object,…

A:

Q: A camera weighing 10 N falls from a small drone hovering 20 m above it and enters free fall What is…

A: Given: Weight,W=10NHeight, measure from ground,h=20m The potential energy that a massive object has…

Q: km Calculate the kinetic energy of a 4.2 × 10° kg satellite moving at a speed of 6.0 - Round your…

A:

Q: 8. The driver of a car steps on the gas, and the car accelerates with acceleration a. When writing…

A: The motion of any object is governed by Newton's three laws of motion. The second law states that…

Q: Ah = ? Ax = 20m

A: Given that:m=250 kguA=10 m/suB=15 m/s

Q: kinetic energy

A:

Q: A motorbike engine can develop a power of 90 kW in order to keep a constant velocity of 30 m/s. What…

A:

Q: When the speed of a car is doubled, the car's

A: When speed of car is double i e        v' = 2v . And we know  Momentum = mv  Interia depends on…

Q: An object changes speed such that its kinetic energy doubles. If its original speed was v, what is…

A: Given data:  New kinetic energy (KE') = 2KE The original speed = v Required: New speed (v')

Q: A 5-kg mass falls 100 cm. How much work was done on it by the gravitational force? * O 78 J 71 J 50…

A:

Q: Which of the following is the SI unit for gravitational kinetic energy? Watt Second Newton Work…

A: Unit of Gravitational potential energy is Joule which same as unit of work .

Q: lo and Europa are two of Jupiter's moons. lo orbits closer to Jupiter than Europa. Assume that both…

A: Gravitational potential energy or gravitational energy is the potential energy of a massive object…

Q: Your friend throws a stone that has a mass of 4kg straight down from the top of a 175m tall building…

A:

Q: body is projected up vertically with a velocity of 60 m/s. What percentage of its initial kinetic…

A: Given: The velocity is 60 m/s (u= 60 m/s) Time is 3 seconds (t=3s) Take g=10 m/s2

Q: A student stands at the top of a building of height 50 m. He throws two identical balls with a speed…

A: These is a problem of kinematics under gravity. The ball thrown downward has initial speed of 20…

Q: Which one of the following situations is an example of an object with a non-zero kinetic energy? a…

A: Required : An example of an object with a non zero kinetic energy.

Q: A crate of mass 10 kg starts from rest at the top of a 7 - m-long ramp inclined at 45 deg. The ramp…

A:

Q: Using the picture of the roller coaster, calculate the KE when the coaster is HALF the distance DOWN…

A:

Q: If you triple the velocity of an object, by how much does this change the object's kinetic energy?

A: Let the initial velocity of object = vLet the mass of object = m

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.