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1. A spacecraft that is initially at rest turns on its engine at t = 0. If its mass is m = 3000 kg and the force from the engine is 45 N, what is the acceleration of the spacecraft?
2. A hockey puck moves on an icy surface that is frictionless, with a constant speed of 30 m/s. How long does it take the puck to travel the length of the hockey rink (60 m)?
3. An ice skater moves without friction on a frozen pond. While traveling at 8.0 m/s, she finds that it takes 17 s to travel the length of the pond. How long is the pond?
4. An object moves with a constant acceleration of 4.0 m/s2. If it starts with an initial speed of 30 m/s, how long does it take to reach a velocity of 250 m/s?
In the figure below, a slide loving pig slides down a certain 32° slide in twice the time it would take to slide down a frictionless 32° slide. What is the coefficient of kinetic friction between the pig and the slide
A wire with a current of 4.90 A is to be formed into a circular loop of one turn. what is the required radius
A in-ground swimming pool has a dimensions of 20 meters long by 15 meter wide and 3.00 meter deep. What is the total force exerted on bottom of pool
A potter's wheel (a solid, uniform disk) of mass 6.0kg and radius 25cm spins about its central axis with an angular speed of the wheel is 15rpm, Find the new angular speed of the system in rpm
For a simple harmonic oscillator with k= 4.0N/m and A=0.75 m, the time between maximum velocity and maximum acceleration is 2.50s. Find the maximum velocity and maximum acceleration
Suppose you measure the terminal voltage of a 3.260 V lithium cell having an internal resistance of 5.50 by placing a 1.00 kvoltmeter across its terminals, Find the actual terminal voltage to the nearest 0.01 V
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
A time-dependent force, Fvecbold = (7.50i hat bold ? 4.05tj hat bold), How far is the object from its initial position when its speed is 15.0 m/s
A 98 kg waterskier is being pulled at a constant velocity. The horizontalpulling force is 270N. Find the magnitude of the total resistive force exerted on the skier by the waterand air
question1an electron is a subatomic particle m 9.11 times 10-31 kg that is question to electric forces. an electron
A car rounds a banked curve. The radius of curvature of the road is R .the banking angle is a. the coefficient static friction is f.
A car of mass 1430 kg traveling at 28 m/s is at the foot of a hill that rises 105 m in 3 km. Find the average power delivered by the car's engine
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