Phys 101 أنت تسأل ونحن بإذن الله نجيب (الجزء الأول)

اول شي ما شا الله عليكم
والله همة
تقعدون تدرسون صبح الخميس

ثانيا جزاك الله اخوي حسين على مساهمتك
ما قصرت عزيزي

بالنسبة لسؤال 1 من 061
الحل في المرفقات

بالنسبة للسؤال الثاني
اخونا راعي الياهو ما قصر
الفكرة بما فيها انه اعطاك الكتلة واعطاك مقدار الاستطالة عشان تطلع ثابت النابض من القانون التالي
mg=kx
بعدها يقولك يبغى شغل النابض اثناء تمدد النابض من 0.06 m الى 0.16 m
حيث انه تمدد فقط 10 cm عن تمدده الأصلي
وتطلعه من القانون المعروف لشغل النابض

اتمنى يكون الشرح واضح

 

اسئلة واجب ch 7
السؤال الأول
A 0.2 kg ball is thrown at a speed of 40 m/s at an angle of 30° with the horizontal. What is the kinetic energy of the baseball at the highest point of its trajectory? Give the answer in J and give three significant figures.

 

السؤال الثالث

The force experienced by a particle of mass m = 4 kg moving along the x-axis is shown in the figure. The particle’s velocity is 2.0 m/s at x =0. What is its velocity at x = 2.0 m? Give the answer in m/s and give two significant figures.

 

السؤال الرابع

A block of mass 10 kg is dragged over a rough, horizontal surface by a 60 N force acting at 30.0° above the horizontal. The block is displaced 5 m, and the coefficient of kinetic friction is 0.500. Find the total change in the block’s kinetic energy. Give the answer in J and three significant figures.

 

السؤال الخامس

A spring stretches 3 cm, when a mass of 5 kg is hung vertically on it. How much work an external agent do to stretch this stretched spring an additional 4 cm? Give the answer in J and give three significant figures.

 

السؤال السادس
A 4 kg block is attached to a spring of force constant 600 N/m as in figure. The block is pulled 5 cm to the right of equilibrium and released from rest. Find the speed of the block as it passes through equilibrium if the coefficient of friction between block and surface is 0.3. Give the answer in m/s and give three significant figures.

 

السؤال السابع


An elevator car has a mass of 1,600 kg and is carrying passengers having a combined mass of 200 kg. A constant friction force of 4000 N retards its motion upward. What power must the motor deliver at the instant the speed of the elevator is 3.00 m/s, if the motor is designed to provide the elevator car with an upward acceleration of 1.00 m/s2? Give the answer in kW and give three significant figures.

 

السؤال الثامن

(Points: 1) The only horizontal force acting on a 2 kg mass are F1 = (10 i + 9 j) N and F2 = (-2 i - 3 j) N. If the mass is initially at rest, how fast it will it be moving after it has traveled a horizontal distance of 0.5 m? Give the answer in m/s and give two significant figures.

 

هذا الواجب الجديد
السؤال الأول

In the figure, a frictionless roller coaster car of mass m = 800 kg tops the first hill with speed
vo = 30 m/s at height h = 50 m. If the gravitational energy of the car-Earth system is taken to be zero at A, what is the mechanical energy of the system when the car is at C? Give the answer in kJ and give three significant figures.

 

السؤال الثاني
On a planet X, a 0.5 kg ball thrown directly from the surface of the planet, upward with an initial speed of 15 m/s reaches a maximum height of 10 m. Take the gravitational energy of the ball-planet system is taken to be zero at the surface of the planet.
What is the gravitational potential energy of the ball-planet system at maximum height? Give the answer in J and give two significant figures.

 

السؤال الثالث

 

السؤال الرابع

 

السؤال الخامس

 

السؤال السادس

 

السؤال السابع

 

آخر سؤال