Impulse + Momentum
Would a car with a mass of 520 kg traveling at 70m/s have more inertia than a car with a mass of 600kg traveling at 20m/s
no
A 40 Newton block travels on a frictionless surface at 1.4m/s to the right. What is the normal force applied to the object?
40 Newtons
What direction does the acceleration and the centripetal force of an object move in a circular path?
An object falls freely th kinetic energy of the object....
Increases
An object will stay in motion if__
no outside forces act upon it
A 60 kg roller skater exerts a 10 Newton force on a 30 kilogram roller skater for .2 seconds. What is the magnitude of the impulse applied to a 30kg roller skater?
2 newtons per second
A 20kg object is accelerating at 2 m/s/s. What is the new force acting on the object?
40 Newtons
An object in circular motion has a velocity that is _ to the center of the circle
Tangent
An object falls freely, the potential energy of the object....
Decreases
Object A exerts 100 N of force on Object B that weighs 500N away from its starting point. How much force does Object B exert on Object A
100N
A 500 Kg car traveling at 20 m/s due east collides with a 400 Kg car traveling at 40 m/s due west. The total momentum of the system before the collision is 6000 Kg*M/s west. What is the total momentum of the system after the collision?
6000 Kg*m/s due west
What is the effect on theforce of gravity between two objects if the mass of one object is doubled and the other object is quadrupled, and the radius between them stays constant?
The gravitational force is 8 times greater
A 5kg object with a centripetal force of 20 newtons must have a centripetal acceleration of...
4 m/s/s
How much work is done by a 10kg object lifted 2m in the air?
200 W
How much does an object weigh that has a 4 N force acting on it that's accelerating at 8 m/s
.5kg
An unbalanced force acts on an object over a period of 10 seconds and produces an impulse of 200 joules. What is the magnitude of the unbalanced force acting on the object?
20 Newtons
balls a and b are 2 meters from eachother. Ball a weights 3kg and Ball B weighs 5kg. What is the magnitude of the gravitational force exerted by ball a on ball b?
2.5x10^-10 Newtons
An object moving in acircular path has a constant speed of 10 m/s and travels around a radius of 2 meters. What is the centripetal acceleration
50 m/s/s
What is the power output of an electric motor that lifts a 2kg block 10 meters vertically in 5 secs?
40 W
A student is standing in an elevator that is accelerating downward. The force that the student exerts on thefloor of the elevator is....
less than the weight of the student when at rest.
A 1kg ball of clay is traveling at 1m/s towards a 2kg ball of clay, and they collide and stick together. What is the final velocity of the 2 balls of clay after they collide
vf= 1/3
A 30 kg object is being pulled at 5m/s by a 100 N force. What is the coefficient of friction?
.3
A 10 kg object in circular motion has a centripetal force of 80 newtons and is moving at a constant speed of 2m/s. What is the radius of its path?
.25 meters
What is the mechanical energy of an object with a potential energy of 10 joules that weighs 2kg and is moving at a speed of 6 m/s?
46 Joules
How is it possible for an object moving at a constant speed to be in dynamic equilibrium?
all foreces must be equal to zero if the object is not accelerating