A. engine B. wheels C. brakes D. steering wheel 相关知识点: 试题来源: 解析 A。此题考查汽车运动的原理。选项 A“engine”发动机,为汽车提供前进的动力。选项 B“wheels”车轮是传递动力的部件,但不是提供动力的源头。选项 C“brakes”刹车,用于使汽车减速或停止,不是推动汽车前进的力量。选项 D“steerin...
A car moves on the road. The force that helps it move forward is ___. A. wind force B. gravity C. friction force D. thrust force 相关知识点: 试题来源: 解析 D。A 选项“wind force”是风力;B 选项“gravity”是重力;C 选项“friction force”是摩擦力;D 选项“thrust force”是推力。...
A car is moving on a flat road. The force that helps it move forward is ___. A. gravity B. friction C. engine force D. magnetism 相关知识点: 试题来源: 解析 C。汽车在平路上行驶,是发动机的力使其前进。选项 A 重力不是使汽车前进的力。选项 B 摩擦力可能会阻碍汽车前进。选项 D 磁力...
John says, “I really enjoy tracking this through the study, watching his personality begin to grow and support me on my road back to mental health, which he is playing a big part in.”“Gibson has done so much for me in a short space of time. I want to do something for him.”...
In the mid-1600s, the great English physicist Isaac Newton figured out that the amount of force needed to move an object was directly related to both the mass of the object and how it is accelerated. (Pushing a pebble clearly takes less force than pushing a boulder, and pushing a ...
In this case, the cylinder will act as a pulley and will increase the force needed to move the car. This is because the chain will have to support the weight of the car as well as the weight of the cylinder, which will add to the overall force needed to tow...
Featured: Webcast: The State of JADC2 Register: Events at AUSA Top 100 Defense Companies ByValerie Insinna Feb 27, 2020 The U.S. Air Force is interested in nontraditional electric vertical-takeoff-and-landing technologies, like this Joby Aviation aircraft, that are being pioneered by ...
What average force is required to stop an 1700 kg car in 7.0 s if the car is traveling at 75 kmh? Equation of Motion: A body with initial velocity u is moving in a direction with uniform acceleration a covers a distance s in some time t. Then the equ...
Determine the minimum horizontal force needed to make a body of mass 2 kg begin to slide up a plane inclined to the horizontal at 30° if the coefficient of static friction is 0.6. Take g to be 9.8 m/s2. Figure 5.6.6 shows the forces acting on the object. As the body is just on...
How much force is needed to accelerate an 1800 kg car at a rate of 3 m/s^2? A 2,500 kg car accelerates uniformly from 35.0 m/s to 78 m/s in 20.0 s. What is the net force exerted on the car? A car of mass 700 kg accele...