A student builds a rocket-propelled cart for a science project. Its acceleration is not quite high enough to win a prize, so he uses a larger rocket engine that provides 33% more thrust, although doing so increases the mass of the cart by 12%. By what percentage does the cart’s acceleration increase?

Q: A 2.8 kg ball strikes a wall with a velocity of 6.7 m/s to the left. The ball bounces off with a…

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Q: The heaviest watermelon weighed in at 159 kg (350.5 lbs.) and was grown by Chris Kent (USA) of…

A: The mass of the watermelon, m=159 kg The height of the building, h=150 m The acceleration due to…

Q: A 10-kg mass and a 5-kg mass are connected by a string. The string is hung taut over a pulley such…

A: Given The first mass is m1 = 10 kg. The second mass is m2 = 5 kg. The height at which the m1 is…

Q: Your mass is 77.3 kg, and the sled s mass is 18.9 kg. The sled is moving by itself on the ice at…

A: Given : m1 = 77.3 kg m2 = 18.9 kg v2 = 3.73 m/s

Q: A girl, having a mass of 15 kg, sits motionless relative to the surface of a horizontal platform at…

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Q: A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the…

A: GIVEN:               MassM = 66 kg                Time ( t ) = 0.040 s               Force exerted…

Q: In a slap shot in hockey, the stick and puck are only in contact for 0.030 s. During this time, the…

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Q: Two penguins, Wheezy and Mumble, are racing down an icy slope into the water below.  Wheezy has a…

A: The coefficient of friction μ=0.12 The angle of inclination θ=80 The free body diagram of the…

Q: The rocket engine pushes 90 g/s of gas at a speed of 300 m/s in comparison to the rocket. The…

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Q: A 2kg mass is launched upward initially at 12.1 m/s. A drag force of 0.7v opposes the motion (where…

A: Given that: Mass of the object, m=2 kg Drag force, F drag=0.7v initial velocity u=12.1 m/s Let time…

Q: A 5.0 N horizontal force is applied to a 2.5 kg cart for 3.8 m (starting with a speed of 0 m/s).…

A: given; horizontal force=5 N Mass = 2.5 kg initial speed is =0 m/s distance =3.8 m final velocity v

Q: You're standing at the top of a snow-covered hill, sloped at 20.0°. The coefficient of kinetic…

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Q: 0 A cannon shoots a 5 kg cannonball out of its barrel with a speed of 65 m/s. If the cannonball…

A: Given Data:- First Problem:- Mass of the cannonball is m=5 kg Length of the barrel of the cannonball…

Q: A 40,000-kg cargo plane on board an aircraft carrier is to deliver relief supplies to a far-flung…

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Q: The two masses in the figure are released from rest. What is the speed (in m/s) of the masses after…

A: Mass of each block are 3 kg and 2 kg respectively Acceleration due to gravity (g)=9.8 m/s2 Distance…

Q: How long does it take him to reach the south shore?

A: Conservation of linear momentum According to the law of conservation of linear momentum, the linear…

Q: A 80.0 kg skater with the Birmingham Bulls hockey team with an initial speed of 7.8 m/s stops…

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Q: After making some measurements in lab, you start to daydream about travel to other planets. Your…

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Q: Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 830 N for the…

A: Apply newton’s second law of motion along the motion of the lift, and substitute 95kg, for m,…

Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

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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 boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.6 m/s.…

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Q: A small block with mass 0.200 kg is released from rest at the top of a frictionless incline. The…

A: Given Data :m1 = 0.2 kgm1 = 0.4 kgdistance travelled by m1 in 0.2seconds is 0.508 metersinitial…

Q: The coefficient of friction between the wheels of Yamaha motorcycle and the dry pavement is 0.79. An…

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Q: A clever coyote uses rocket powered skates to try to catch a roadrunner. The mass of the coyote is…

A: The mass of the coyote: m=38.1 kg Since the coyote starts at rest, it initial velocity is zero, u=0…

Q: Two ice skaters stand together as illustrated in Figure (a). They "push off" and travel directly…

A: The objective of this question is to find the velocity of the girl after the two ice skaters push…

Q: Bank robbers have pushed a 1000 kg safe to a third-story floor-toceiling window. They plan to break…

A: Let M denotes the mass of the safe, m denotes the mass of the furniture, f denotes the friction…

Q: A 0.087 kg arrow is fired horizontally. The bowstring exerts an average force of 80 N on the arrow…

A: Given data: Mass of arrow (m) = 0.087 kg Average force (F) = 80 N Distance (d) = 0.90 m Speed of…

Q: A hockey puck with mass 0.166 kg is pushed across the ice with a constant force of 0.89 N. The…

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Q: 8. GO The space probe Deep Space 1 was launched on October 24, 1998. Its mass was 474 kg. The goal…

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Q: An astronaut (70.0 kg) is on a 15,000 kg rocket. It takes off from the launchpad on Earth, with the…

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Q: The pulley in the figure and the rope that connects the two blocks are ideal. The mass of body 2 is…

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Q: Your forehead can withstand a force of about 6.0 kN before fracturing, while your cheekbone can…

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Q: You are playing a game and you push a cart to give it in. speed. The cart starts at the bottom…

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Q: Emma and Katie are racing along in their new wagon. Upon reaching the bottom of the hill traveling…

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Q: A 0.697 kg football is thrown upward with an initial speed of 49.7 m/s.  Neglecting wind resistance,…

A: Given: m=0.697 kg vo=49.7 m/s g=9.8 N