
A force of 1.150 x 10° N pushes a man on a bicycle forward. Air resistance...
A force of 1.150×103 N pushes a man on a bicycle forward. Air resistance pushes against him with a force of 635 N. If he starts from rest and is on a level road, what speed ? will he be going after 30.0 m? The mass of the bicyclist and his bicycle is 90.0 kg. v=....... ms?
A force of 5500 N gives Sally a little push forward as she rides her bicycle. At the same time air resistance pushes against her with a force of 100 N. If she starts with a speed of 2.0 m/s and is on a level road, how fast will she be moving after 30 m? The mass of the bicyclist and her bicycle is 120 kg.
A man pushes a lawn mower on a level lawn with a force of 207 N. If 35% of this force is directed forward, how much power does he expend in pushing the mower 6.6 m in 10 s?
A man pushes a lawn mower on a level lawn with a force of 194 N. If 37% of this force is directed forward, how much power does he expend in pushing the mower 5.2 m in 13 s? W
A man pushes on a 75.0 kg box such that his force of 225 N is exerted at an angle of 27.0o to the horizontal as shown. (a) If the floor exerts a frictional force of 44.0 N on the box, what is the net force acting on the box? (b)If the box is initially at rest, how far will it have been pushed in 5.00 s assuming those forces continued?
An 90.0 kg spacewalking astronaut pushes off a 660 kg satellite, exerting a 85.0 N force for the 0.590 s it takes him to straighten his arms.
Harry pushes his 1.50x103 N school trunk with a horizontal force of 345 N for a distance of 24.0 m through the train station. The coefficient of kinetic friction between the trunk and the ground is 0.22. Using work and energy techniques, find the speed of the trunk after moving 24.0 m, assuming the trunk starts at rest.
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 18 m, his speed is 4.6 m/s. His mass, including the propulsion unit, has the approximately constant value of 128 kg. Find the work done by the force generated by the propulsion unit. (Neglect air resistance.) WP =
Bob starts riding his bicycle from a stopped position. When he starts pedaling, the net force on the bicycle is 37.2 N. The mass of Bob and his bike is 72.63 kg. What is his speed 12.1 s later? Give your answer in m/s. Enter your answer up to 5 decimal places. Do not enter units.
An 97 kg spacewalking astronaut pushes off a 685 kg satellite, exerting a 97 N force for the 0.5 s it takes him to straighten his arms. a. What impulse is delivered to the astronaut from the satellite? kg m/s b. What's the speed of the astronaut after he pushes off? (We'll call the astronaut and satellites initial velocity 0.) m/s c. What's the speed of the satellite after the astronaut pushes off? m/s d. How far apart are the...