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
You pull straight down on one side of a rope stretched across a pulley. Attached to the other side of the rope is a 10-kg box. How much force must you pull down on the rope to get the box to accelerate upward at a rate of 10 m/s2 ?
William is driving his brand new 200 kg motor scooter around a frictionless, banked ramp having a radius of 70 m, and a speed limit of 40 km/h. The banking angle is 15( above the horizontal, and William takes this curve as fast as he can without skidding
Mars has 11% the mass of the Earth and a radius 54% of the Earth. What is g on Mars?
The Moon has a mass of 7.4 X 10^22 kg and a radius of 1.7 X 10^6 m. What is the force of gravity experienced by a 70-kg astronaut standing on the lunar surface?
An object, initially rotating with an angular speed of 15 rad/s, is subjected to a torque of 55 N.m that accelerates it constantly at 5.0 rad/s^2. What is the moment of inertia of the object?
A 20 m ladder, with a mass of 30 kg, is leaning against a wall with its base 10.0 m from the wall and at a slope of 65° to the floor. Because both the wall and the floor are frictionless, a rope is tied horizontally 1.00 m from the ladder to the floor. A
A four-wheeled, 5-kg baby carriage carries a 5-kg baby. The front wheels are 60 cm from the back wheels and 90 cm from the carriage handle. Assuming that the center of gravity for the baby and the carriages center is equidistant between the front and back
The Earth is at an average distance of 1 AU from the Sun and has an orbital period of 1 year. Jupiter orbits the Sun at approximately 5 AU. About how long is the orbital period of Jupiter?
The Moon has a mass of 7.4 X 10^22 kg and a distance from the Earth of 3.8 X 10^8 m. The Earths mass is 6 X 10^24 kg. What is the magnitude of the gravitational potential energy of the Moon?
A boy pushes a 10-kg crate across the floor with a constant force of 10 N against a force of friction. The box accelerates at a rate of 0.1 m/s2. What is the magnitude of the opposing frictional force?