A man pushes a lawn mower on a level lawn with a force of 201 N. If 44% of this force is directed forward, and 65 W of power is expended in pushing the mower 5.6 m, how much time is spent in pushing the mower this distance?

Q: A man pushes a lawn mower on a level lawn with a force of 213 N. If 53% of this force is directed…

A:

Q: An 80-kg baseball player hits a baseball doing 117 J of work over a distance of 0.59 m. How much…

A: Answer 198.3N

Q: It takes you 4 seconds to drag a 100 kg sofa 2.5 m across the floor while exerting a constant…

A: Time taken to drag the sofa t=4 s The mass of the sofa m=100 kg The distance moved d=2.5 m The force…

Q: A student weighing 551 N climbs at constant speed to the top of an 14 m vertical rope in 17 s. What…

A:

Q: Brick load. A load of bricks with mass m = 363 kg is to be lifted by a winch to a stationary…

A:

Q: When its 80 kW engine is generating full power, a small single-engine airplane with mass 750 kg…

A: Given data:  Full power of engine (Pfull) = 80 kW Mass (m) = 750 kg Speed (v) = 2.5 m/s Required:…

Q: A skeir of mass 115 kg travels down a ski trail. Suppose the ski trail is not frictionless.  a) if…

A:

Q: When its engine of power 74 kW is generating full power, a small single-engine airplane with mass…

A:

Q: An 80-kg jogger that is initially running at 5.0 m/s uniformly accelerates to 8.0 m/s in a time of…

A:

Q: A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting…

A: Given:            m = 800 kg            v   = 7.5 m/s            h  = 8.7 m            t   =  4 s…

Q: F The Figure shows an approximate representation of the contact force versus time during the…

A: Impulse = It is the product of Force and change in time Impulse = F∆tThe area of the given graph…

Q: A 83.5 kg man walks up a set of stairs in 11.7 s. The man rises 4.5 m in going up the stairs. What…

A: Write the expression for the work done by the man to climb a set of stairs and substitute the…

Q: average power delivered

A:

Q: A crane lifts a 320 kg crate up a height of 4.5 m. The crane has a power rating of 2000 W. How much…

A: Given data The mass of the crate is given as m = 320 kg. The height up to which the crate lifts is…

Q: A car could accelerate from rest to 60 mi/hr (27 m/sec) using a 302 V8 in a time of 1.2 sec.  If the…

A: solution

Q: A man pushes a lawnmower on a level lawn with a force of 193 N. If 40% of the force is directed…

A: Given: The force is F=193 N The horizontal force is FH=40100F=0.4×193 N=77.2 N The displacement is…

Q: A 1000 kg car is initially travelling at 26ms26ms along a horizontal road when the driver hits the…

A: The car is having a deceleration. The equation of motion is given by, v=u-at Here, v is the final…

Q: A single force F(x) = -4.0x (in newtons) acts on a 1.0-kg body. When x = 3.5 m, the speed of the…

A: Given Data: Fx=-4x Nm=1.0 kgSpeed of the body at x=3.5 m is, 4.0 m/s

Q: A skier of mass 62 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: mass of skier (m) = 62 kg distance pulled (d) = 50 m Angle of incline (θ) = 30oConstant speed (v) =…

Q: A motorist runs out of gas on a level road 150 m from a gas station. The driver pushes the 1,120 kg…

A: Given: Distance traveled, d=150 m Mass, m=1120 kg Force, F=180 N Formula: Work=Force×distance W=F×d

Q: A race car travelling on a straight and flat stretch of track must overcome 1.5 kN of resistance to…

A: Given : F = 1.5 kN = 1.5 x 103 N v = 190 km/hr = 190 x 1000/3600 = 52.78 m/s

Q: How long will it take a 751-kg car with a useful power output of 57.5 hp (1 hp equals 746 W) to…

A:

Q: a 75.8 kg person runs up a flight of stairs having a rise of 5.3 m in a time of 4.5 s. What average…

A: Given data: Mass (m) = 75.8 kg Height (h) = 5.3 m Time (t) = 4.5 s Required: The average power (P)

Q: A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

A: Given:Mass = 61 kgDistance to be covered = 55 mAngle = 30oSpeed = 2.1 m/s

Q: A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting…

A: Mass of helicopter M= 780 kg Iniatial speed of helicopter u = 0 Final speed of helicopter v= 10.0…

Q: A 55.5 kg man walks up a set of stairs in 10.2 s. The man rises 4.5 m in going up the stairs. What…

A: Given Data Mass of man, m = 55.5 kg height, h = 4.5 m Time taken, t = 10.2 s Average power (in…

Q: You push a 100 kg wheeled (frictionless) cart across a floor a distance of 13 m by applying a force…

A: Given data:  Mass (m) = 100 kg Displacement (d) = 13 m Force (F) = 10 N Time (t) = 9 s Required:…

Q: A man pushes a lawn mower on a level lawn with a force of 192 N. If 45% of this force is directed…

A:

Q: how much power in watts is required to accelerate a 1200 kg car from rest to 16 m/s in 8 seconds…

A: Solution: Given: m = mass of car = 1200 kg u = initial speed of car = 0 m/s v = final speed of car =…

Q: A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required…

A: (a)   The work required to pull the skier on the slope can be determined as follows. W=Fsloped=61…

Q: An electric motor is rated to have a maximum power output of 0.79 hp. If this motor is being used to…

A:

Q: Your job is to lift 25.0 kg packaged boxes a vertical distance of 1.0 m from the ground onto the bed…

A:

Q: A skier of mass 71 kg is pulled up a slope by a motor-driven cable. (a) How much work is required…

A:

Q: A motorist runs out of gas on a level road 210 m from a gas station. The driver pushes the 1,120 kg…

A: The work done is defined as the force applied over the distance , thus it is calculated by using the…