A 75 kg fisherman in a 135 kg boat throws a pile of 0.80 kg rocks towards the shore. If he throws each rock with a speed of 15 m/s causing the boat to move, how many rocks must he throw per minute to maintain a constant average speed against a 5.0 N force of resistance? 20 rocks 25 rocks 12 rocks 15 rocks

Q: A 0.150kg glider slides on an ice pond with negligible friction with speed of 0.8 m/s. It has a…

A:

Q: A soccer ball with mass 0.420 kg is initially moving with speed 2.00 m/s. A soccer player kicks the…

A: Mass of the ball = 0.420 kg Initial speed = Vi = 2 m/s Final speed = Vf = 6 m/s Force applied = F =…

Q: A basketball with a mass of 0.62 kg falls vertically to the floor where it hits with speed of -6…

A:

Q: *10. mmh A stream of water strikes a Stationary turbine "0 = +16.0 m/s stationary turbine blade…

A: Given: Incident velocity of water (vo) = +16.0 m/s. Exiting velocity of water (vf) = -16.0 m/s. Rate…

Q: A 0.35 kg baseball is dropped from rest from a height of 3.85 m. How fast will it travel just before…

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Q: A ball having mass 3.2kg and velocity 9.4m/s travels due east. An impulsive force at point O, makes…

A: Given,

Q: 60 kg skier skis without friction down a slope which is 100 m high and along a path thag is 200m…

A: Given: The mass of the object is 60 kg. The height of the object from the ground is 100 m. The path…

Q: A swimmer with a mass of 75 kg dives off a raft with a mass of 500 kg. If the swimmer's speed is 4…

A:

Q: Someone has played a practical joke on you, and your favorite chair is stuck at rest in the middle…

A:

Q: 3. A goft ball of mass 0.058 kg is hit off the tee at a speed of 25 m/s. The golf club was in…

A: Mass of the ball (m)=0.058 kg Final Speed (v)=25 m/s Time of contact∆t=2.5×10-3 s

Q: Your mass is 69.6 kg, and the sled s mass is 20.9 kg. You start at rest, and then you jump off the…

A: person's mass, mp=69.6 kgmass of sled, ms=20.9 kginitial speed of both person and sled together, u =…

Q: A 1000 kg car travelling at 30m/s collided head-on with a 2000 kg van travelling at 20 m/s. After…

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Q: 45-g baseball was hit with an average force of 115 N over a distance of 5.75 m. What is the speed of…

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Q: Xyrus throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5…

A: Force is defined as the rate of change of momentum.        F= dP/dt  P= m*v

Q: A freight train is being assembled in a switching yard and so at rest at the beginning. Car 1 has a…

A: Given: The mass of the car1 is m1= 65x103 kg. The velocity of the car1 is 0 m/s. The mass of the…

Q: atomic nucleus initially moving at 375 m/s emits an alpha particle in the direction of its velocity,…

A: Given  Initial speed = u = 375 m/s  Final speed = v = 250 m/s  Mass of alpha particle = Mh = 4 .0 u…

Q: 1.2 kg ball is moving at 3.5 m/s when it collides with another 0.75 kg ball that is at rest. After…

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Q: A computer on the table is at rest. This means that   A. Computer has no energy   B. No net…

A: Balanced forces are the force that acts on the object in an equal magnitude and opposite direction.…

Q: Two runners run up two different flights of stairs. They reach the top at the same time. The man has…

A: We need to analyze certain parameter about the motion of a man and a woman.

Q: Jestoni pulls Junry whose mass is 55 kg and who is sitting on a swing with rope of length 4 m,…

A: Given: The mass (m) of Junry is 55 Kg. The length (h) of the rope is 4 m. The angle (θ) rope makes…

Q: a 0.150 kg golf ball moving horizontally at 7.8 m/s hits w 2.2 kg block that is at rest on a…

A:

Q: Two skaters are facing each other on a frictionless ice.  Aly has a mass of 47 kg and Dave has a…

A:

Q: A 78-kg fisherman in a 115-kg boat throws a package of mass m = 15 kg horizontally toward the…

A:

Q: A 45.1 kg block is sliding along a frictionless surface with a speed of 65.4 m/s.  It collides with…

A: Mass of object 1, m1 = 45.1 kg Mass of object 2, m2 = 76.3 kg Initial speed of object 1, u1 = 65.4…

Q: Two objects are connected by a light string passing over a light, frictionless pulley as shown in…

A: (a)The total energy of an isolated system must be conserved. Take the table as the reference for…

Q: A railroad car of mass 2.85 x 10^4 kg moving at 2.60 m/s collides and couple with two coupled…

A:

Q: A hand pushes block A (m= 3 kg) with a constant force Nand. A= 75 N for a distance Ax = 2 m along a…

A:

Q: Grandma has a new car that uses rocket brakes to slow it down. The car has a mass of 850 kg. She…

A: Mass of car (m) = 850 kg Initial speed (u) = 12.8 m/s (in forward direction) Final speed (v) = 9.32…

Q: A 34.g golf ball is at rest on a tee. A golfer swings his club and hits the ball so that the club…

A: Given: The mass of the golf ball is 34 g. The average force is 390 N. The duration of force is 5.9…

Q: A ball having mass 6.5kg and velocity 6.3m/s travels due east. An impulsive force at point O, makes…

A: Mass of ball (m)=6.5 kg Initial velocity of ball (u→)=6.3 i^ m/s Final velocity of ball (v→)=8.1 j^…

Q: A 160 g baseball is thrown with a speed of 20 m/s. It is hit straight back toward the pitcher at a…

A:

Q: A golf club exerts an average horizontal force of 1000 N on a 0.045-kg golf ball that is initially…

A: Givenhorizontal force = 1000 N Mass of golf ball = 0.045-kg golf ball  initially velocity = u = 0…

Q: A 500 g cart is released from rest 1.00 m from the bottom of a frictionless, 30.0∘ ramp. The cart…

A:

Q: A hockey puck (mass = 4 kg) leaves the players stick with a speed of 12 m/s and slides on the ice…

A: Deceleration  a = 0.3 × 9.8 =   2.94 m/s².

Q: You are sitting in a sled, at rest on a pond covered with nice, thick, frictionless ice. Your own…

A:

Q: Two students are watching an action film in which a car drives down a ramp onto the back of a moving…

A:

Q: You and your friends are doing physics experiments on a frozen pond that serves as a frictionless,…

A: Given data: Mass of Nowell, m1=80 kg Speed v1=6.00 m/s at θ1=370 Mass of Allyzza, m2=50 kg Speed…

Q: Two objects (m1 = 4.70 kg and m2 = 2.85 kg) are connected by a light string passing over a light,…

A: a) The equation of motion for the two blocks, From equation (I) and (II), the acceleration of the…

Q: A 52 kg cart rolls down a 5.0 meter tall hill. What is the velocity of the cart at the bottom of…

A:

Q: An object of mass 12.9 kg enters a rough floor with speed of 10.1 m/s. The coefficient of friction…

A:

Q: A box of mass 2.0 kg is hit with an arrow of mass 0.030 kg. The box then slides 24 cm before coming…

A:

Q: In the process of being thrown, a 500.0 g ball goes from rest to a speed of 10.0 m/s over a distance…

A: Given: The mass of the ball is 500.0 g. The final velocity of the ball is 10.0 m/s. The distance…

Q: Mickey, a daredevil mouse of mass 0.0201 kg,0.0201 kg, is attempting to become the world's first…

A: Given: mass m = 0.0201 kg spring constant k = 87.5 N/m distance x = 0.145 m speed v = 2.15 m/s…

Q: The only force acting on an object of mass 2.00 kg moving along the x-axis is shown in the figure.…

A: Consider that the area under the curve will tell the impulse that is needed to separate -Ve and -ve…

Q: A 4 kg block moving right at 6 m/s collides elastically with a 2 kg block moving right at 3 m/s.…

A:

Q: A hunter holds a 4.0 kg rifle and fires a bullet of mass 5.0 g with a muzzle velocity of 250 m/s.…

A:

Q: Freight car A with a gross weight of 152000 lb is moving along the horizontal track in a switching…

A:

Q: A 58.0 kg person running at an initial speed of v, = 3.70 m/s jumps onto a m= 116 kg cart initially…

A: "As per the guidelines i solved only first three subpart". (a) v2=u2+2gdv=u2+2gd=3.70 m/s2+29.8…

Q: A swimmer with a mass of 75 kg dives off a raft with a mass of 500 kg. If the swimmer’s speed is 4…

A:

Q: A 3.0 kg hockey puck on a frictionless surface moves at 8.0 m/s toward a stationary 4.0 kg hockey…

A: Given data: Mass of the first hockey puck is, m1 = 3.0 kg Mass of the second hockey puck is, m2 =…

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.