A 38.0-kg boy, riding a 1.90-kg skateboard at a velocity of 5.60 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 9.60° above the horizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Be sure to include the correct algebraic sign with your answer

Q: A 3650-kg open railroad car coasts at a constant speed of 9.00 m/s on a level track. Snow begins to…

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Q: A father (mF = 90 kg) and his daughter (mD= 42 kg) stand on a flat frozen lake of negligible…

A: Given data: Mass of father (mf ) = 90 kg Mass of daughter (md ) = 42 kg In the given problem,  there…

Q: A 25 kg crate is released at the top of a ramp tilted at 40 degrees above the horizontal if the…

A: Given : mass of crate, m = 25 kg Coefficient of kinetic friction, μk = 0.3 Angle of inclination =…

Q: A tennis ball of mass 0.0621 kg is served. It strikes the ground with a velocity of 54.0 m/s (120…

A: Mass, m = 0.0621 kg  Velocity, v = 54 m/s Δt=0.0630 s  Δvx=53cos18ᵒ-54cos(-22ᵒ)…

Q: For both questions, consider the following: A 5 kg and 8 kg block are on a horizontal table. The 5…

A: m = 5 kg  M = 8 kg  u = 0  U = 4 m/s

Q: A 88 kg man lying on a surface of negligible friction shoves a 66 g stone away from himself, giving…

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Q: crane drops a 1.9 kg steel ball onto a steel plate. The ball's speeds just before impact and after…

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Q: The Zacchini family was renowned for their human- cannonball act in which a family member was shot…

A: Given information: Here, R is the range, s is the distance traveled inside the barrel, θ is the…

Q: A canoe is designed to have very little drag when it moves along its length. Riley, mass 62 kg ,…

A: A canoe is designed to have very little drag when it moves along its length.Riley, mass  m1= 62 kg ,…

Q: A child runs with a speed of 7.00 m/s and jumps onto a 11.00kg sled initially at rest on a flat bed…

A: Initial velocity of the child, uc=7 m/sInitial velocity of the sled, us=0 m/sMass of child, mc=m…

Q: A crane drops a 1.8 kg steel ball onto a steel plate. The ball's speeds just before impact and after…

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

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Q: A baseball of mass 0.145 kg is thrown at a speed of 33.0 m/s. The batter strikes the ball with a…

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Q: Find the x and y components of the average force on the ball. Suppose that the +x axis is directed…

A: x-y plane having force in negative side of the x,y axis is taken as negative.

Q: A crane drops a 1.8 kg steel ball onto a steel plate. The ball's speeds just before impact and after…

A: Mass of the crane(m)=1.8 kg Initial speed(vi)= -8.1 m/s Final speed (vf) =  3.7 m/s  Momentum…

Q: A 67.0 kg person is riding a bike on a level horizontal street. Together, the bike and person have a…

A: Mass of the person (m1) =67 kgCombined mass  of  person  and  bike                     is 74.6 kg .…

Q: A 4.30-kg steel ball strikes a wall with a speed of 9.0 m/s at an angle of = 60.0° with the surface.…

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Q: A 829 g rubber ball was vertically pushed downward at 1.03 m/s from a height of 80.3 cm above a…

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Q: Two bumper cars at the county fair are sliding toward one another (see figure below). Initially,…

A: Using formula: ki=kfvf=((m1-m2)/(m1+m2))(vim1)+((2m2)/(m1+m2)) Vim2 x and y velocity of bumper car 2…

Q: A 0.544-kg ball, initially moving with a speed of 2.54 m/s, bounces off a wall and then moves with a…

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Q: In a baseball game, one of the players graps the ball and lessens the influence of the ball by…

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Q: Two blocks (m₁ and m2) are released from rest at a height of h= 14.00 m on a rough track. The…

A: h = 14mm1 = 4.09 kg , m2= 7.93kg

Q: A batter hits a 0.334 kg basball that was approaching him at 23.4 m/s and, as a result, the ball…

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Q: A 13 N east

A: initial speed u = 2.5 m/s horizontal force F=13 N mass= 6.4 kg time, t=2.1 s

Q: A 49.0-kg boy, riding a 2.40-kg skateboard at a velocity of 5.60 m/s across a level sidewalk, jumps…

A: (given) Mass of boy = 49 kg Mass of skateboard = 2.40 kg Momentum of skateboard is  Pboard=2.40 kg…

Q: An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.99 m/s.…

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Q: A soft ball (m = 0.14 kg) moving horizontally to the right hits a wall with a speed of 16.2 m/s.…

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Q: Dizzy is speeding along at 30.4 m/s as she approaches the level section of track near the loading…

A: Given:- The initial velocity is u = 30.4 m/s  The final velocity is v = 3.95 m/s  The mass of the…

Q: In a ski competition, skiers first slide down a slope of 10 degrees and then encounter a horizontal…

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Q: A crane drops a 1.9 kg steel ball onto a steel plate. The ball's speeds just before impact and after…

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Q: In a ballistics test, a 25.0 g bullet traveling horizontally at 1200 m/s goes through a 40.0 cm…

A: Given: Mass of bullet is 25 g Initial velocity is 1200 m/s Thickness 40 cm final speed is 900 m/s

Q: You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors…

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Q: A 45 g golf ball leaves the tee with a speed of 43 m/s after a golf club strikes it.  Determine the…

A: Given that, The mass of the ball is m=45 g The ball leaves the tee with a speed of 43 m/s

Q: 3. A 10 g bullet is fired into a 2.00 kg block sitting on a horizontal frictionless surface. The…

A: Given m=10g=0.01kg, M=2kg, θ=40⁰, μ=0.10, d=4.00m

Q: A 5.5 kg block of wood resting on a platform was hit by a 12 g of bullet travelling upward with a…

A: Given, mass of the wooden block, m = 5.5 kg mass of the bullet, mb = 12 g speed of the bullet, ub =…

Q: A baseball (m = 147 g) approaches a bat horizontally at a speed of 40.7 m/s (91.1 mi/h) and is hit…

A: Given Mass of the base ball is , m=147 g=147×10-3 kg Initial speed of the baseball is, vi=40.7 m/s…

Q: 107.5-kg rugby player is initially running at 8.5 m/s in the positive direction, but collides…

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Q: A 5 kg box is sliding on a frictionless surface with a velocity of 6 m/s. It collides with a wall…

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Q: During a squash game, a player hits the ball, of 24 g, which is moving toward him horizontally at…

A: m=241000 Kg (mass of the ball)u=-150 Km/h (initial velocity of ball before…

Q: A 4.10-kg steel ball strikes a wall with a speed of 13.0 m/s at an angle of ? = 60.0° with the…

A: Given data:  Mass (m) = 4.10 kg Speed (v) = 13.0 m/s Angle (θ) = 60.0° Time interval (Δt) = 0.200 s…

Q: A block of mass m1 = 15.5 kg slides along a horizontal surface (with friction, μk = 0.29) a distance…

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Q: Three carts are moving on a frictionless horizontal track as shown in the figure.  The 4.00 kg cart…

A: (given) By conservation of linear momentum, m1= 4kg, v1=7 m/sm2=10 kg, v2=6 m/sm3=3kg  ,v3 =7mm3/s…

Q: A 69.0-kg boy and his 37.0-kg sister, both wearing roller blades, face each other at rest. The girl…

A: I have used the concept of conservation of momentum

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…

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Q: A 3.50-kg steel ball strikes a wall with a speed of 9.0 m/s at an angle of e = 60.0° with the…

A: When the ball strikes the wall, the momentum changes and the momentum is conserved and change in…

Q: Object A has a mass of 50kg and is moving along the +x axis with a speed of 10m/s. Object B has a…

A: Given data *Object A has a mass is ma = 50 kg *Object A is moving with a speed is va = 10 m/s…