Physics

Why does the crane need a counterbalance?
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One Newton equals .225
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The nervous system has two distinct branches. They are the:
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a blwoing ball traveling 2.0 m/s has a 16 J of Kinetic energy what is the mass of the bowling ball in KG
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A weight lifter raises a mass of 50kg through a height of 2m. He does this 25 times in one minute. Find hisaverage power.
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A gust of wind blows an apple from a tree. As the apple falls, the force of gravity on the apple is 9.11 N downward, and the force of the wind on the apple is 1.18 N to the right. What is the magnitude of the net external force on the apple? Answer in units of N. Part 2: What is the direction of the net external force on the apple (measured from the downward vertical, so that the angle to the right of downward is positive)? Answer in units of
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Mark is pushing a box down the hall. Mark is using 5N to push the box 20m. How much work is Mark doing?
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A 52-kg bike is moving along a smooth road at a constant velocity of 8.4 m/s. What is the net force acting on the bike
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can someone help me answer this? i dont get it and I need help before the next 30 minutes. ill give a brainiest to whoever helps me tyyy :)
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Engineers are using computer models to study train collisions to design safertrain cars. They start by modeling an elastic collision between two train carstraveling toward each other. Car 1 is traveling east at 6 m/s and has a massof 3,154 kg, Car 2 is traveling west at 23 m/s and has a mass of 8,296 kg.After the collision, car 1 has a final velocity of 7 m/s west. What is the finalvelocity of car 2?A. 18 m/s eastB. 23 m/s westC. 23 m/s eastD. 18 m/s westSUN
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A cheetah can run at a maximum speed91 km/h and a gazelle can run at a maximum speed of 72.7 km/h.If both animals are running at full speed,with the gazelle 87.5 m ahead, how long beforethe cheetah catches its prey?Answer in units of s.
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A school bus moves slower and slower. Using what you have learned about forces, explain why the bus moves slower and slower.
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PLZZZ HURRY!!! I will freind and make brainliest What are the basic building blocks of matter?electronsatomsmoleculescompounds
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Two technicians are discussing the FMVSS 135 standards for parking brakes. Technician A states that the hand force required to set the brake should not exceed 80 lb. Technician B states that the foot force to set the brake should not exceed 80 lb. Which technician is correct?
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During a baseball game, a hitter strikes the ball with a bat. When this happens, the balland the bat exert a force on each other. Why does the ball accelerate away from the batmore than the bat accelerates away from the ball?a. The ball has less mass, so it exerts less force on the bat.b. The bat exerts more force than the ball because the batter is exerting a forceon the bat as it hits the ball.c. The ball has less mass, so the equal force on the ball and the bat causesgreater acceleration of the ball.d. The ball has a greater velocity before the collision, so the force affects the ballmore than it affects the bat.
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A fixed particle with charge 8.8 nC and a second particle with charge 4.3 nC, respectively, are initially separated by a distance of 0.11 m. They are released and the second particle moves 0.030 m. A) What is the change in electric potential energy? B) Did the second particle move toward or away from the source charge?
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A wave has a frequency of 8 Hz, how long is the period?A 16B .125C 64D 8
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Which pairs of elements could not react to form an Ionic compound
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A car has a velocity of 10m/s.it now accelerates for 1m/s for 1/4 minutes. Find the distance travelled in this time and final speed of the car
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If a car that is moving 20.0 m/s has a momentum of 29000 kgm/s, what mass is the car?
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Two conducting loops of the same diameter, #1 made of copper and #2 made of aluminum wires of the same length and cross-sections are placed on the horizontal surface in uniform magnetic field directed vertically up. Magnetic field vanishes suddenly. The magnitude of emf in loop #1 is
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Three identical 6.4kg masses are hung by three identical springs. Each spring has a force constant of 7.8 Kn/m and is 12cm long before any masses are attached to it. how long is the bottom most spring going to be after the three masses are hung on ita. 14.3 b. 16.2 c.12.8 d.10.7
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Fgrav = 600 NI need help
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At the start of a hockey game the record a job at the puck between two players from the opposing team. Each player wants to push the puck in the opposite direction. For several seconds the park does not move even though both players are pushing on it with the hockey sticks. What forces are acting on the puck, why the park does not move, and how one of the players could get the park to move in a direction they want
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