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A turtle crawls along a straight line, which we will call the x-axis with the positive direction to the right. The equation for the turtle’s position as a function of time is (look at the equation below).
(a) Find the turtle’s initial velocity, initial position, and initial acceleration.
(b) At what time t is the velocity of the turtle zero?
(c) How long after starting does it take the turtle to return to its starting point?
(d) At what times t is the turtle a distance of 10.0 cm from its starting point?
plot a velocity time graph using the date given below n.me(s)=0,2,4,8,10 . velocity(m/s)=0,10,20,40,50
A wire of length 0.75 m carries a current of 20.0 A. The wire experiences a force of 5.8 N in the presence of a magnetic field of 0.50 T. What is the angle between the magnetic field and the wire?
A pebble is dropped from the top of a 25-m tall building. How long will it take before the
pebble hits the ground?
An adventurous archaeologist crosses between two rock cliffs by slowly going hand over hand along a rope stretched between the cliffs. He stops to rest at the middle of the rope. The rope will break if the tension in it exceeds 25,000 N. Our hero’s mass is 90 kg. (a) If the angle is 10º, find the tension in the rope. (b) What is the smallest value the angle can have if the rope is not to break?
Draw the free-body diagram of the following situations:
1. A free-falling object (neglect air resistance).
2. A cellphone is at rest on top of a table.
3. A man pulling one sack of rice across the floor.
A student drives 5.5 km from his home to school in 35 minutes but makes the return trip in only 25 minutes. What are the average speed and average velocity for
A. Each half of the round trip
B. Total trip
Two balls at the ends of two strings are moving at the same speed in the horizontal circular paths. One string is three times as long as the other. Compare the magnitudes pf the two centripetal acceleration.
If a car requires 30. seconds to accelerate from zero to 90. kph (km/hr), its average acceleration is, most nearly,
A boy sitting on a swing is suspended motionless. ( His feet are not touching the ground) The swing seat is supported by two ropes attatched to the branch of tree
