مسائل فيزيائية استصعبت علي .. مساعدة
السؤال الاول :
What is the kinetic energy of a 5 kg mass moving at 5 m/s ?
السؤال الثاني :
An object with weight 5Kg is freely falling form 10 meters height.
¡What is the Potential energy of that object?
¡How much force is applied on that object?
السؤال الثالث :
How much force is needed to accelerate a 700 kg car 2 m/s2
السؤال الرابع :
What acceleration will result when a 200 N net force applied to a 25 kg object?
السؤال الخامس :
A net force of 8 N causes a mass to accelerate at a rate of 3 m/s2. Determine the mass.
السؤال السادس :
A 100 kg roller coaster is released from position "A" with an initial speed of 30 m/s. The designer of the roller coaster wants the cart to come to a complete stop at point "B". How high must point "B" be above the ground? (use g = 9.8 m/s2)
السؤال السابع :
A car of mass 1100 Kg drives with a velocity such that it has a kinetic energy of 400 kJ ( see the Figure). Find the velocity. If the car is raised with a carne how high should it be lifted in the standard gravitational field (9.81 m/s2) to have a potential energy that equals the kinetic energy?
