acts on a body of mass 2kg. Initially at rest. Choose the correct option. APower of force is continuous increasing. BThe work done by this force on the body during first 2 seconds of its motion is 64 J. CVelocity at 2 seconds after beginning of motion is 8 m/s. DPower of force...
A force of 10 N acts on a body of mass 0.5 kg for 0.25s starting from rest.What is its momentum now? View Solution A force acting on an object of mass 500 g changes its speed from 200 cm/s to 0.2 m/s. The change in momentum is ...
25 A force of 70 newtons acts on an area of 20 cm2force The force is increased by 10 newtons.pressure =area The area is increased by 10 cm2Helen says,"The pressure decreases by less than 20%"Is Helen correct?You must show how you get your answer.No (supported) ...
12 A 30 N force acts on a 1 kg mass and 2 kg mass on a frictionless surface as shown.T1kg2 kg30N What is the size of tension T and the resultant force on the 1kg mass?C T/N resultant force on 1kg mass/ N A A2010202010101020 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
Two forces are applied to a car in an effort to move it, as shown in the figure. Determine the magnitude of the resultant force on the car. A force of 4N acts on a body of mass 2kg for 4s. Assuming the body to ...
Balanced Force and Acceleration:The difference between the force that acts on the object and the frictional force is equal to the net force that acts on the object. The net force of the object is defined as the multiplication of the ...
本句是主谓结构，act是不及物动词。可以分析为：At such times,是状语 justice是主语 acts 是谓语like a living force可以看作是介词短语作方式状语。
题目【题目】 A block of mass 2 kg rests on a rough horizontal plane. A force P acts on the block at an angle of 45" to the horizontal. The equilibrium is limiting. with = 0.3.Find the magnitude of Pif:P acts in a downward direction ...
结果1 题目 12 A force of 25N acts on an object. The work done by the force is 400J.How far does the object move in the direction of the force?C A 6.3cm B 16cm C 16m D. 10km 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
Answer to: A dense particle with mass 1 kg follows the path r(t) = ( \sin 7t, \cos 2t, 2t^{7/2}) with units in meters and seconds. What force acts...