One Dimensional Motion
A mini van is initial traveling south at 80 m/s to drop off a group of students to a science museum and then travels north at 50 m/s to bring the kids to Fielder's. If this trip took 2 hours, calculate the mini van's average acceleration.
average acceleration = 0.018 m/s2
calculate the mass of an object that experiences a 13 N net force and then accelerates 2.5 m/s2.
m = 5.2 kg
Calculate the initial velocities (in both the x and y direction) for a ball that is kicked at 12 m/s at a 15 degree angle from the horizontal.
Vix = 11.6 m/s and Viy = 3.11 m/s
What is the change in kinetic energy of a 12 kg mass that is forced to stop after traveling 10 m/s?
change in KE = -600 J
How long will it take a 1750 W motor to lift a 315 kg piano to a sixth story window that is 16 m above the ground?
t = 28.2 s
A car traveling 5 m/s accelerates uniformly to reach a speed of 12 m/s. It took this car 3 seconds to do this. Calculate the car's acceleration.
a = 2.33 m/s2
An object has a mass of 14 kg. Calculate the weight of the object.
Fg = 137.5 N
A ball is thrown with an initial velocity of 30 m/s at an angle of 45 degrees to the horizontal. Calculate the maximum height of the ball.
A 65 kg firefighter climbs a flight of stairs that is 20 m tall. How much work is required?
W = 1.27x104 J
A 60 kg jogger runs up a long flight of stairs that is 20 m in height in 62 s. How much power output does the jogger produce?
P = 189.7 W
A race car accelerates uniformly at 11.2 m/s2 for 4 s. Calculate the displacement of the car if it started from 2 m/s.
x = 97.6 m
An object has a force of friction acting on it equal to 20 N as it moves along a floor. is mass is 8 kg. Calculate the coefficient of friction of the floor and object.
u = 0.26
A car flied horizontally off a cliff at 73 m/s. It takes 3 seconds for the car to land. How tall with the cliff?
y = 44.1 m or -44.1 m
What is the change in kinetic energy of an object that experiences a 32.8 N force and then moves 4m?
change in kinetic energy = 131.2 J
Calculate the impulse of a tennis ball that experiences a 200 N force in 0.7 s.
I = 140 Ns
An airplane accelerates down a runway at 3.2 m/s2 for 32.8 s until it finally lifts off the ground. Calculate the displacement of the airplane.
x = 1.72x103 m
A 15700 kg upward tension force is exerted on a 1200 kg piano as it is lifted upwards. Determine the acceleration of the piano.
a = 3.28 m/s2
A football is launched into the air with an initial velocity of 3.2 m/s at an angle of 30 degrees to the horizontal. Calculate the range of the football.
x = 0.91 m
A box is carried to the right 2 m with an upward force of 10 N. Calculate the work done on the box.
W = 0 J, angle = 90 degrees
Calculate a bouncy ball's change in momentum if its mass is 1.9 kg and it initially is going leftward at 13 m/s and rebounds off a wall at 9 m/s.
change in p = 41.8 kg*m/s
A paintball leaves a paintball gun at 80 m/s. while accelerating through the barrel of the gun, the paintball moves a distance of 0.84 m. Calculate the acceleration of the paintball.
a = 3.81x103 m/s2
A leftward applied force of 302 N is applied to a 25 kg crate to accelerate it across the floor. The coefficient of friction between the crate and the floor is 0.25. Determine the acceleration of the crate.
a = -9.63 m/s2
A dart is throw horizontally at a target 4 m away. The arrow hits a point 0.17 m below the point that it was aimed at. Calculate the initial velocity of the arrow.
Vix = 23.7 m/s
A rock is shot out of a volcano and goes 150 m into the air. Calculate rock's initial velocity.
v = 54.2 m/s
A 0.5 kg object is initially at rest. A leftward 3 N force acts on the object during a time interval of 1.5 s. Calculate the final velocity of the object.