الديناميكا (القوى وقوانين نيوتن للحركة)

Forces and Newton's Laws of Motion

Forces and Newton's Laws of Motion

قوانين الديناميكا
Using Newton’s Laws

Using Newton’s Laws

قوانين الديناميكا
الفلاتر
المقالات في الفئة الديناميكا (القوى وقوانين نيوتن للحركة)
الاسم
A pulley has a radius of 45 cm and a moment of inertia of 0.15 kg.m2. A string is wrapped around the pulley, and a 25-g mass is hung from the string on one side of the pulley. Calculate the magnitude of the angular acceleration of the pulley.
A satellite orbits the Earth at a distance of 200 km. If the mass of the Earth is 6.0 X 10^24 kg and the Earths radius is 6.4 X 10^6 m, what is the satellites speed?
A box of unknown mass (m) slides down a plane inclined at an angle (0). The plane has a coefficient of friction (µ). Which of the following expressions would you use to calculate the rate of acceleration (a)?
An 11kg box is being pushed with an applied force of 1.50 x 10^2 N up a frictionless ramp inclined at 27 degrees to the horizontal. What is the acceleration of the box?
A 1000-kg car experiences a centripetal force of 1.8 X 10^5 N while making a turn. The car is moving at a constant speed of 30 m/s. What is the radius of the turn?
Two mountains are 1.00 km apart. If their masses are identical (2.00 × 1010 kg) what is the force due to gravity between the mountains?
A 10-kg crate is on a plane that is inclined at an angle of 45°. The coefficient of friction is 0.1, and the downward direction is positive. What is the approximate rate of the boxs acceleration?
An ice skater skates around a circular rink with a diameter of 20 m. If it takes her 62.8 s to go around the rink once, what is the coefficient of friction of the ice?
A soldier fires a musket with a barrel that is 1 m in length. The gases from the exploding gunpowder exert a constant net force of 50 N on a 0.010-kg bullet as it travels through the musket barrel. What is the bullets velocity
The coefficient of friction between the rubber tires of a car and dry concrete is µ = 0.64. If a car enters a horizontal turn with a radius of 10.0 m, what is the maximum speed that the car can have and still hold the road?