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Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. The length of the vectors will not be graded.
Calculate the force and the total work required in each case. which method is easier?
A dolphin leaps out of the water at an angle of 35 ° above the horizontal. The horizontal component of the dolphin's velocity is 7.7 m/s. Find the magnitude of the vertical component of the vel
One billiard ball is shot east at 2.60 {rm m/s}. A second, identical billiard ball is shot west at 1.40 {rm m/s}. The balls have a glancing collision, not a head-on collision, deflecting the second
At 3 P.M. a car is located 20 km south of its starting point. One hour later it is 118 km farther south. After two more hours, it is 9 km south of the original starting point. What is the displaceme
A metal rod is 25.000 cm long at 25.0 degrees Celsius. When heated to 102.0 degrees Celsius, it is 25.054 cm long. What is the coefficient of linear expansion for this metal?
Its blades form a circle of diameter 0.700. What is the tangential speed of a point on the tip of the blade at time = 0.209 ?
Besides the gravitational force, a 3.90-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.30 - 3.30) m, where the directi
Her hands are in contact with the wall for 0.8 s. Ignoring friction and air resistance, find the magnitude and direction of the average force she exerts on the wall.
Two sound sources radiating in phase at a frequency of 450 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find the sepa
A 0.125 kg baseball is dropped from rest. If the magnitude of the baseball's momentum is 0.790kg*m/s just before it lands on the ground, from what height was it dropped?
A basketball player who is 2.00 m tall is standing on the floor 10.0 m from the basket. If he shoots the ball at a 40.0 degree angle with the horizontal, at what initial speed must he throw so that
So that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the d
Determine the acceleration of each block and the tension in the string?
A diver releases an air bubble of volume 2.4 cm3 from a depth of 13 m below the surface of a lake, where the temperature is 7.0°C. What is the volume of the bubble when it reaches just below the
What is the apparent weight of a 75 kg astronaut 2500 km from the center of the earth's moon in a space vehicle accelerating toward the moon at 3.2 m/s^2
An impulse of 149 Ns is required to stop a person's head in a car collision. If the face is in contact with the steering wheel for 0.0152 s, what is the average force on the cheekbone? Answer in uni
One end of this rod is attached to the ceiling by a frictionless hinge, so the rod is free to swing back and forth. Pendulum B is a simple pendulum whose length is also d. Obtain the ratio TA/TB of
In terms of G, Me, m, and r, find the total mechanical energy Ea and Eb of the two satellites plus Earth's system before collision.
A 87 g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 76 cm. What is the speed of the arrow as it leaves the bow?
The acceleration of gravity is 9.81 m/s2 . Assuming that air resistance is simply a constant 95 N force on the person during the fall, determine the person's velocity just before hitting the net.
A rectangular block of ice 7 m on each side and 0.9 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block
(a) calculate the deceleration of the cyclist. (b) calculate the distance travelled by the cyclist in this time.
Determine the number of 400-kg horses it can carry. This is a problem found in a conceptual physics book so no need to get to mathmatical.
Suppose you wanted to reach Alpha Centauri in 100 years. How many times faster is the speed you found in (a) than the speeds of our fastest current spacecraft (around 50,000 km/hr)?