a car of mass 1500kg is moving up a straigt road,which is inclined at an angle *to the hrizontal,where sin*=1/14,the resistance to the motion of the car from non-gravitional forces is constant and is modelled as a single constant force magnitude 650N.The car's engine is working ...
A car of mass 500 kg is moving at a speed of 20 m/s. What is its kinetic energy? A. 100000 J B. 10000 J C. 20000 J D. 50000 J 相关知识点: 试题来源: 解析 A。动能的计算公式为 Ek = 1/2mv²,代入数据可得 Ek = 1/2×500×20² = 100000 J。选项 B 计算错误,选项...
5 A car of mass500(kg)is moving at10(m/s). When the driver decides to accelerate, a force of200 acts on the car for12.Answer these questions to find out how fast the car moves after it has accelerated.a Calculate the impulse that makes the car accelerate.b Calculate the momentum o...
A car of mass 1500 kg is accelerating at 2 m/s². What is the force acting on the car? 查看试卷及答案 相关搜索 1 PAT-2007-Paper 2 军考英语真题《历军考真题系列》 3 acceleration单位 -回复 4 ENERGYISTHEABILITYTODOWORK=TOAPPLYAFORCEOVERA 答案解析 A。本题考查牛顿第二定律 F = ma,其...
2. A car of mass 1000 kg is moving along a straight horizontal road. The engine of the car is working at a constant rate of 25 kW. When the speed of the car is vm s-', the resistance to motion has magnitude 10v newtons.(a)Show that, at the instant when v=20, the acceleration...
结果1 题目 3 A car of mass 1000 kg is moving on a road with an accelerat sinof2.0m/s^2 .What is the driving force of the engine if the car experiences a constant resistance of1000 N?D A 500N B 1000N C 2000N D 3000N 相关知识点: 试题来源: 解析 D 反馈 收藏 ...
5 A car of mass 900kg moves along a straight level road. The power developed by the car is constant and equal to 60kW. The resistance to the motion of the car is constant and equal to 1500N.At time t seconds the velocity of the car is denoted by vms1. Initially the car is at ...
I. A car of mass 1200 kg moves up a straight road. The road is inclined to the horizontal at an angle a where s na=1/(15) . The car is moving up the road with constant speed 10 m s-'and the engine of the car is working at a constant rate of 11 760 watts. The non-gra...
A car of mass m is moving on a straight road with an initial velocity v₀. A constant braking force F is applied to stop the car. The car travels a distance d before coming to a stop. Which of the following expressions is correct according to the work - energy theorem? A. Fd =...
A car of mass 1,000 kg is driving along a straight road with a speed of 30 m/s. A truck of mass 10,000 kg is heading in the opposite direction with a speed of 20 m/s We call the direction of the car the positive direction. The...