a body in motion remains in motion, a body at rest stays at rest unless acted on by a net force.
What is Newtons first law
100
True or False. Mechanical Energy is conserved in a system.
What is True
100
True or False. In an elastic collision, momentum and kinetic energy is not conserved
What is False
100
the product of the radius and angular acceleration
What is the tangential acceleration
200
True or False. An object being thrown and an object being dropped will reach the ground at the same time
What is True
200
A 5 kg box is attached to another 7 kg box and they pull upwards with a 150 N force. Find the tension of the string between the blocks?
What is T = 88 N
200
How much power is needed to push a 95 kg crate at 0.62 m/s along a horizontal floor with coefficient of friction is 0.78.
What is P = 450.2W or .45kW
200
An 11000 kg car rests at the end of a railroad track. The car is hit by a second car of 9400 kg moving at 8.5 m/s. and the couple stick together. The speed of the two cars is
What is V'=3.92 m/s
200
A wheel turns through 2 revolutions while accelerating from rest at 18 rpm/s. How long does it take to spin?
what is t = 0.47 sec
300
A = 3i - 7j + 4k
B = -2i + 5j + 3k
Find the cross product of the two vectors
What is r = -41i -17j + 1k
300
True or False. The velocity vector acts toward the center of circular motion.
What is False
300
Rubber Band creates a force F = 5.4x^2 , when stretched by x amount. Find potential energy from x=2 to x=6
What is W = 374.4 J
300
A 5 kg block moves at 4 m/s and hits a 3 kg block at rest. After the collision, what is velocity if the masses do not stick together?
What is V = 1 m/s (5 kg), U = 5 m/s (3 kg)
300
theorem that states the inertia of the center of mass plus the product of the mass of the object and the distance from the center to the axis squared
What is parallel axis theorem
400
A particle leaves the origin with an initial velocity
Vo = 11i+14j m/s, undergoing constant acceleration a = -1.2i + 0.26j m/s^2. What is the y coordinate at the time?
What is y = 299.7 m
400
When a plane turns, it banks to give the wing's lifting force. If a plane is flying at 950 km/hr. and the banking angle is not to exceed 40 degrees, what is the minimum curvature?
What is R = 8.5 km
400
A spring constant K = 340 N/m is used to launch a 1.5 kg block along a horizontal surface with a coefficient of sliding friction of 0.27. If spring is compressed .18 m how far does the block slide
What is x = 1.4 m
400
Average position of all masses
What is the center of mass
400
A hollow ball rolls along a horizontal surface at 5.3 m/s when it encounters an upward incline. If it rolls without slipping, the maximum height is (I = 2/3)
What is h = 2.4 m
500
Motorist suddenly notices a stalled car and brakes, negatively acceleration at 6.3 m/s^2. This is not enough and a collision ensues. From the damage, the car was going 5 m/s and left skid marks 37 m long. How much time elapsed from the initial braking to the collision?
What is t = 2.6 sec
500
A 5 kg box sits on an inclined plane at 30 degrees to the horizontal and is attached to a 4 kg box which is hanging by a pulley. The ramp has a kinetic coefficient of friction of u=0.25, what is the tension in the string?
What is T = 38 N
500
A 710 kg roller coaster car is launched from a giant spring with K = 27 kN/m into a frictionless loop the loop track or radius 7.8 m. What is the minimum spring compression to stay on the track?
What is x = 3.2 m
500
A 90 kg mass moves at 2 m/s in the horizontal direction when it is hit by a 45 kg mass moving at 3 m/s in the vertical direction. What is the velocity after the collision when the masses stick together?
What is V = 1.67 m/s
500
A solid 1.8 kg sphere is rolling at 6.2 m/s. The total kinetic energy of the sphere is (I = 2/5)