هذه البنت تلبس ــــــــــــــــــــــــــــ ابيض و اسود و ــــــــــــــــــــــــــــ ابيض   

نسرين أمريكية من أصل سوري. في الفديو تقول : “أنا مو سورية و مو أمريكية”. وهكذا نعرف أنّ عندها مُشكلة ـــــــــــــــــــــــــــــــــ

ـــــــــــــــــــــــــــ فايروس “كورونا” سريعاً جداً بين الناس في شهر مارس من سنة 2020 ولذلك كان من اللازم أن يبقى الناس في بيوتهم

Use الاسم الموصول to write complete meaningful sentences to talk about the people in each one of these pictures: 2. 3.  

A tennis ball (m = 0.2 kg) is thrown at a brick wall. It is traveling horizontally at 16 m/s just before hitting the wall and rebounds from the wall at 8 m/s, still traveling horizontally. The ball is in contact with the wall for 0.04 s. What is the magnitude of the average force of the wall on the ball?

Which of the following IS a unit of energy?

Which has the greater momentum, a heavy truck at rest or a moving roller skate?

The kinetic energy of an object moving in a circle at a constant speed is  

Which one of the following does not affect the value for the gravitational potential energy of an object?

A 1200-kg frictionless roller coaster starts from rest at a height of 20 m. What is its kinetic energy when it goes over a hill that is 10 m high?