A projectile of mass m is fired horizontally with an initial speed of v0 from a height of h above a flat, desert surface. Neglecting air friction, at the instant before the projectile hits the ground, find the following in terms of m, 0 v0, h , and g : (a) the work done by the force of gravity on the projectile, (b) the change in kinetic energy of the projectile since it was fired, and (c) the final kinetic energy of the projectile. (d) Are any of the answers changed if the initial angle is changed?

Q: An elevator in Goodtaste Baguio of 8 persons-capacity with a mass of 1750 kg plus unknown total mass…

A:

Q: a 75 kg cross country skier is climbing a 3 degree slope at a constant speed of 2.0 m/s and…

A: The mass m=75kg  The speed =2.0m/s To find the final velocity on the level ground

Q: A body of mass 3.65 kg is moving toward x direction with the velocity V = (a-bt) (c-dt), where t is…

A: As per the given condition, at t2= 1.59 s velocity of body is is V=…

Q: Starting a race, a 68.2-kg sprinter runs the first 7.04 m in 1.60 s, starting from rest and…

A: Given: The mass (m) of the sprinter is 68.2 Kg. The distance (S) covered by the sprinter is 7.04 m.…

Q: Consider a system of an 85.0 kg man, his 19.5-kg dog, and the earth. The gravitational potential…

A:

Q: The figure shows the top view of an object mass m moving on a uniformly fought horizontal surface.…

A: Given data: Mass of the object, m=7.15 kg Coefficient of friction, μ=0.644 Radius of the trajectory,…

Q: The initial velocity of a 2-kg particle is (1 i- 3 j) m/s. After some time, the velocity becomes (4…

A:

Q: A block of mass 0.630 kg is pushed against a horizontal spring of negligible mass until the spring…

A: Work-energy theorem states that the work done by external forces equals the change in the mechanical…

Q: The resilin in the body of a flea has a forceconstant of about 24 N>m, and when the flea cocks…

A:

Q: 3. 0.20-kg rocket in a fireworks display is launched from rest and follows an erratic flight path to…

A:

Q: A block of mass 0.640 kg is pushed against a horizontal spring of negligible mass until the spring…

A: Using conservation of energy initial kinetic energy at A = final kinetic energy at top + final…

Q: When a 1984 Alfa Romeo Spider sports car accelerates at the maximum possible rate, its motion during…

A:

Q: What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit…

A: The mechanical power of the climber can be found as, Here, W and t represent the work-done and…

Q: An Olympic swimmer stands on top of a platform at a height H above a swimming pool. At the moment of…

A:

Q: Refer to the figure. A box is pushed 8 m upward with a force of 75 N in a rough inclined plane.…

A:

Q: A body of mass 11 kg projected vertically upward from the ground has a potential energy of 320 J and…

A:

Q: An object is on earth with a mass of 10.0 kg at the top of a frictionless inclined plane of length…

A: ...

Q: A truck of mass 900 kg starts with an initial velocity of 2.00 m/s and travels in a straight line…

A: Mass of the truck,

Q: A force É = (7.10N)i + (4.00 N)ĵ + (5.00 N) k acts on a 1.70 kg mobile object that moves from an…

A:

Q: When a father takes his daughter out for a spin in a stroller, he exerts a force F>with a…

A:

Q: . A car of mass 900 kg is initially travelling at 50 km/h. If the speed increases so that its…

A:

Q: A particle is acted upon by only two forces, one conservative and one nonconservative, as it moves…

A: Given, A particle is acted upon by only two forces, one conservative and one non conservative as it…

Q: The initial velocity of a 3-kg particle is (1 i- 3 j) m/s. After some time, the velocity becomes (4…

A:

Q: A 0.04-kg ball is thrown from the top of a 30-m tall building (point A) at an unknown angle  above…

A:

Q: A hockey puck of mass 0.17 kg is shot across a rough floor with the roughness different at different…

A: (a)   When the hockey puck moves from x=0 to x=2 m, the work done by the kinetic frictional force on…

Q: A projectile has the same initial kinetic energy no matter what th angle of projection. Why doesn’t…

A: To determine,A projectile has the same initial kinetic energy no matter what the angle of projection…

Q: • A ball of mass m = 0.75 kg is thrown straight upward with aninitial speed of 8.9 m>s. (a) Plot…

A:

Q: An object of mass 4.34 kg starts at the top of a hill of height 2 m. When it rolls down to the…

A: The solution is given below

Q: A force F = (10.0i + 9.0j + 12.0k) kN acts on a small object of mass_95 g. If the displacement of…

A:

Q: onsider a ball (0.50 kg) is tossed upward (from an initial elevation of 0.5m) and rises a vertical…

A: Using Energy conservation and finding the difference of potential energy from height which is…

Q: A sledgehammer of mass m = 1.9 kg falls freely vertically downward from a height of h = 2.5 m at an…

A: Mass= 1.9 kg Height= 2.5 m

Q: A 121-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 25.5 °…

A:

Q: The only two forces acting on a 2-kg particle are: F = (3î - 4j) N and F,. The particle moves in the…

A:

Q: A projectile is fired vertically with an initial velocity of 200 ft/s.Using the law of conservation…

A: Given : Initial velocity, u = 200 ft/s = 60.96 m/s

Q: Given: A shooting guard throws a basketball m = 1 kg straight up with an initial speed of v0 = 5.5…

A: Given - m=1kg vo=5.5m/s  ho= 1.95m Gravitational potential energy be zero at ground

Q: The Super Sled travels with an initial kinetic energy of 3369 J horizontally and to the right along…

A: work done is positive if force and distance covered is in the same direction . hence if some force…

Q: A boy of mass m= 36 kg is standing initially at rest relative to the moving walkway, which has a…

A: Given that the value of mass of the boy and velocity of the boy with respect to walkway and…

Q: The horizontal and vertical velocity components of a 2.0 Kg projectile are Vh = 30 m/s and Vv = 40…

A:

Q: If the net work done by external forces on a particle is zero, which of the following statements…

A: The work-energy theorem states that the net work done by the object will be equal to the change in…

Q: A 2.0-kg projectile moves from its initial position to a point that is displaced 20 m horizontally…

A: Mass, m = 2 kg Horizontal displacement = 20 m  Vertical displacement = 15 m

Q: An Olympic swimmer stands on top of a platform at a height H above a swimming pool. At the moment of…

A:

Q: The work done by gravity during the descent of a projectile is: a) negative b) zero c) positive d)…

A: Let an object of mass m be in descent so force applied by gravity is F=mg. Direction of F here is…

Q: If a green particle (8 gm) is equally separated by a distance (d = 5 m) from two particle (A = 4 kg…

A: Given that Mass of green particle m = 8 g = 0.008 kg Mass of A is M1 = 4 kg Mass of B is M2 = 5 kg…

Q: A particle of mass m is constrained to lie along a frictionless, horizontal plane subject to a force…

A:

Q: A boy of mass m = 36 kg is standing initially at rest relative to the moving walkway, which has a…

A: Given, Mass of the boy , m=36 kg Initial velocity of the boy with respect to walkway is , uBw=0…

Q: iđ¢ = (2.80 m)î + (8.50 m)j +(4.40 m) k in 1.70 s. A force F = (7.1ON)Î + (4.00 N)} +(5.00 N)k acts…

A: Given: di = 3.70 i^+8.1 j^+2.0 k^df=2.80 i^+8.5 j^ +4.4 k^