(II) A projectile is fired at an upward angle of 38.0° fromthe top of a 135-m-high cliff with a speed of 165 m/s Whatwill be its speed when it strikes the ground below? (Useconservation of energy.)

Q: A shopper in a supermarket pushes a trolley with a force of 40N directed at an angle of 35° downward…

A: Work-done by a force F over displacement 'd' is given by: W = F.d W = F*d*cos theta Given that: F =…

Q: A 2.1 x 103 - kg car starts from rest at the top of a 5.0 - m - longdriveway that is inclined at…

A: Frictional force is opposite to direction of motion of the car as shown in the figure.

Q: How much work did the movers do (horizontally) pushing a 160-kg crate 10.3 m across a rough floor…

A: Since the crate is moving acceleration, the pusher must do a work to overcome the frictional force.…

Q: How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp equals 746 W) to…

A: Use work energy theorem

Q: Find the work done by the force F = 3i – 5j in moving an object from the point (2,2) to the point…

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: A car weighing 1500 kg is accelerated from a steady state to a speed of 10m / s in 3s. Find the work…

A: Given: The mass of the car is 1500 kg. The final speed of the car is 10 m/s. The time taken by the…

Q: A load of 120 kg is pulled up by 6 m. Find the work done?

A: Given data,   Mass , m  =  120 kg   Height , h  =  6 m   Acceleration due to gravity, g  = 9.8 m/s2…

Q: A worker pushes horizontally on a large crate with a force of 250 N, and the crate is moved 3.0 m.…

A: Given that the force applied by the worker on the crate is F =250 N. The distance moved by the crate…

Q: a 1200 kg sports car is advertised to accelerate from 0-100km/h in 3.00s. What is the power output…

A: Given value--- mass = 1200 kg. initial speed = 0 m/s. final speed = 27.78 m/s. time = 3 sec. We…

Q: A 50lb is lifted, at a constant rate, to a height of 10 feetfrom the ground. Compute the work…

A:

Q: Can the power expended by a force be negative?

A: The rate of doing work is known as power.

Q: A constant force of 55.9 N, directed at 28.7° from horizontal, pulls a mass of 15.3 kg horizontally…

A: The work done in the direction of motion is, W=Fcosθd

Q: Calculate the minimum uncerta inty in the speed of a ball of mass 500 g that is known to be with in…

A: m=Massofbat=500 gΔx=Uncertainityinposition=5 μmh=Planckconstant=6.626×10-34 Js

Q: A crate of mass 105 kg is pushed along a floor with a force of 30 N for a distance of 18 m. Find the…

A:

Q: A wagon extertéd on the handle at angle of 45° with the hovi tal. If the pulled ina Circle of radius…

A: Given: The force is F=40 N. The angle is θ=45°.The radius is r=25 m. The time is t=20 s. The…

Q: How much work did the movers do (horizontally) pushing a 43.0-kg crate 10.3 m across a rough floor…

A: Given data:Mass of the crate, M = 43.0 kgDistance moved, d = 10.3 mCoefficient of friction = 0.50

Q: A box is pulled with a force of 45 N to produce a displacement of 5 m. If the angle between the…

A: Given: The applied force is 45 N. The displacement is 5 m. The angle between displacement and the…

Q: A 2-kg block is tlirown upward from a point 20m above Earth's surface. At what height above Earth's…

A: Formula of gravitational potential energy is as follows: U=mgh…

Q: A 2.0-kg mass is released from rest at the top of a plane inclined at 20o above horizontal. If there…

A:

Q: Suppose a 51.5-kg woman does 50 deep knee bends in which her center of mass is lowered and raised…

A:

Q: Calculate the work needed to lift a 20 kg sack of rice vertically at 6-5 m ?

A:

Q: Cite an example wherein  force exerted on a body does no work. Explain.

A: Work done is defined as the product of force, displacement and cosine of angle between force and…

Q: 2 kg is he ld at the top of plane mass t 30 to the herizontal The frilly Irnclined dingenon.…

A:

Q: A 2.50 kg mass is drop from rest. If it falls a distance of 25.0 m, what will its change in kinetic…

A: From kinematics equation, the expression for the final velocity in terms of displacement is:

Q: A 50 kg sack of rice was raised to height of 1.2 meter by the delivery boy to the car’s roof, find…

A:

Q: When a punter kicks a football, is he doing any work on theball while the toe of his foot is in…

A: The punter can only be applying a force when he is in contact with the football. Therefore the…

Q: An electric motor driven conveyor belt is required to take 2,200 pounds of dirt, rocks, etc. per…

A: A conveyor belt takes 2200 pounds per minute and raises it by 15ft.  2200 pounds (m) = 997.9 kg…

Q: Find the work done to displace body of mass by 3 kg with force of 1.3 N upto 2 m

A: Mass of the body, m=3 kg Force on the object, F=1.3 N Displacement of the body, d=2m

Q: How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and…

A: Using the conservation of energy, the kinetic energy of the car at the lowest point equals the…

Q: need asap A bus has a kinetic energy of 215 J. What kinetic energy would the bus have if it had…

A:

Q: uppose you fire a mass m straight vertically upwards from a spring that is knc compressed a distance…

A: Given:-  Suppose you fire a mass m straight vertically upwards from a spring that is known to have…

Q: A shopper in a supermarket pushes a trolley with a force of 40N directed at an angle of 35° downward…

A:

Q: Discuss the design of the roller coaster shown in the sketch in terms of the conservation of energy.

A: All the hills through which the roller coaster moves are of same height. Because of this the roller…

Q: How much work is performed in steadily dragging a sled 20 m horizontally when the force of 80 N is…

A:

Q: . Find the work done on a lagage of 50 kg. pulled by a string elevated at 45 degrees by force of 100…

A: Given that: F=100Nθ=450d=10 mm=50 kgW=?

Q: • A gardener pushed a lawnmower 68.00ft in 4.000sec by giving a force of 50.00 lbs at an angle of…

A:

Q: Using conservation of energy, how fast would a rollercoaster be traveling at a point half way above…

A:

Q: A mass of 2.12 kg is initially at rest upon a frictionless incline with a 33.2 degree angle of…

A:

Q: If a block isnloaded with two 0.5 kg masses, with the spring pulling it at 30° above the horizontal,…

A:

Q: A mass of 2.0kgis projected with a speed of 5.5m/sup a plane inclined 20 degrees with the…

A:

Q: Find out the work done when a force done of 20N displaces a body through 8m in the direction of the…

A: Write the expression for the work done.

Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A:

Q: 6.35 Just before striking the ground, a 2.0-kg mass has 400 J of KE. If friction can be ignored,…

A: