Charles Coulomb
A 0.054-kg bullet is fired vertically at 186 m/s into a 0.21-kg baseball that is initially at rest. How high does the combined bullet and baseball rise after the collision, assuming the bullet embeds itself in the ball?
Y= 73.77m
A 0.5kg ball moving at 4 m/s collides elastically with a 1kg stationary ball. What are the velocities of both balls after the collision?
V1f =2.7m/s
V2f=-1.4m/s
A 35N force is used to slide a 45N crate a distance of 5.4m at a constant speed along an incline of 30º, to a vertical height of 2.7m. What is the increase in gravitational potential energy of the crate after it has slid 5.4m along the incline?
PEg = 121.5 J
High-speed stroboscopic photographs show that the head of a 225-g golf club is traveling at 43 m/s just before it strikes a 51-g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 37 m/s. Find the speed of the golf ball just after impact.
Vf2 = 26.47 m/s
What name is used to refer to a group of frogs?
An army
When a 3kg object is hung vertically on a certain light spring, the spring stretches to a distance yo. What force does the spring apply to the object?
Fs= 29.43 N
What country did AC/DC originate in?
Australia
A 0.011-kg dart is fired vertically at a 0.34-kg apple that is initially at rest. After the dart embeds itself in the apple, the combined system rises to a maximum height of 56 m. What was the initial speed of the dart?
vi1 = 1057.8 m/s
A soccer player runs at 7.5m/s and runs into the 75kg referee standing on the field. The ref then flies forward at 5.2m/s. If this were a perfectly elastic collision, what would the mass of the soccer player be?
M1 = 118.18 kg
When a 3kg object is hung vertically on a certain light spring, the spring stretches to a distance yo. What is the force if you stretch the spring 6.5cm?
Fs = 68.81 N
When a 3kg object is hung vertically on a certain light spring, the spring stretches to a distance yo. If the spring stretches 2.78 cm, what is the force constant of the spring?
PEs = 1.15 J
A 0.2kg ball is pitched at 30 m/s and hit straight back at 40m/s. The bat is in contact with the ball for 0.01 seconds. What is the impulse on the baseball?
I = -14kgm/s
Two pool balls collide head on when the billiards player breaks the game. A red ball with a mass of 1.5kg is moving left with a velocity of 0.67m/s, and the 0.5kg white ball is moving right at a velocity of 1.74 m/s. What are the final velocities of each pool ball?
Vf1 = 0.535 m/s
Vf2= -1.875 m/s
A 2kg cart is moving at 3m/s to the right. A 4kg cart is moving 2m/s to the left. What is the total momentum of the system?
Pi =-2kgm/s
A block of mass m=0.42 kg is attached to a spring, and the spring is stretched by a distance x=0.68 m from its natural length. The block is placed on an inclined plane with an angle θ=23. Find the spring constant of the spring.
K = 2.37 N/m
Vf = 1.13 m/s
A 0.2kg ball is pitched at 30 m/s and hit straight back at 40m/s. The bat is in contact with the ball for 0.01 seconds. What is the average force exerted by the bat on the ball?
F = -1400 N
Two pool balls collide head on when the billiards player breaks the game. A red ball with a mass of 1.5kg is moving left with a velocity of 0.67m/s, and the 0.5kg white ball is moving right at a velocity of 1.74 m/s. What is the momentum of each of the pool balls after the collision?
P1 = 0.803 Kgm/s
P2 = -0.938 kgm/sA 2kg cart is moving at 3m/s to the right. A 4kg cart is moving 2m/s to the left. If the carts stick together after colliding, what is their final velocity?
Vf = -1.75 m/s