Bob throws a rock straight into the air. Right after it leaves
Bob's hand, the magnitude of the rock's acceleration is ...
a) equal to 0
b) larger than g
c) equal to g
After leaving the hand of Bob, the rock is under free fall, therefore it has a constant acceleration due to gravity 'g' acting downwards.
Answer: (c) equal to g
Bob throws a rock straight into the air. Right after it leaves Bob's hand, the magnitude...
A child on a bridge throws a rock straight down to the water below. The point where the child released the rock is 78 m above the water and it took 1.7 s for the rock to reach the water. Determine the rock's velocity (magnitude & direction) at the moment the child released it. Also determine the rock's velocity (magnitude & direction) at the moment it reached the water. Ignore air drag. | … Choose direction- vf -Choose direction …...
A rock is thrown (not dropped) straight down from a bridge into the river below.Immediately after being released, is the magnitude of the rock's acceleration greater than g, less than g, or equal to g ? Explain.Immediately before hitting the water, is the magnitude of the rock's acceleration greater than g, less than g, or equal to g? Explain.
A child on a bridge throws a rock straight down to the water below. The point where the child released the rock is 51 m above the water and it took 3 s for the rock to reach the water. Determine the rock's velocity (magnitude & direction) at the moment the child released it. Also determine the rock's velocity (magnitude & direction) at the moment it reached the water. Ignore air drag.
A rock is thrown (not dropped) straight down from a bridge into the river below. At each of the following instants, is the magnitude of the rock's acceleration greater than g, equal to g, less than g, or 0? Explain? a. immediately after being released. b. just before hitting the water.
You throw a rock straight up and it returns to your hand with the samc vertical speed you gave it. Up is positive and down is negative. Distance is measured from your hand a. Draw the rock's position vs. time graph on the left-hand axes b. Draw the rock's velocity vs. time graph on the middle axes c. Draw the rock's acceleration vs. time graph on the right-hand axes. 4. The motion of a train traveling on a straight track...
Bob is standing on a bridge over the Credit River. He throws a 0.0830-kg rock straight down with a speed of 10.51 m/s. The rock hits the water 1.47 s later. What was the height of the rock above the water in metres at the moment it was thrown? Enter the magnitude ONLY no SIGN. Enter your final answer up to 5 decimal places. Do not enter units.
An attacker at the base of a castle wall 3.70 m high throws a rock straight up with speed 7.50 m/s at a height of 1.51 m above the ground. (a) Will the rock reach the top of the wall? (b) If so, what is the rock's speed at the top? If not, what initial speed must the rock have to reach the top? (c) Find the change in the speed of a rock thrown straight down from the top...
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 23 m/s at an angle 28 degrees; with respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. What is the horizontal component of the ball’s velocity right before Sarah catches it? What is the vertical component of the ball’s velocity right before Sarah catches it? What is the time the ball...
Daredevil Bob Schwartz jumps a number of school buses on his
motorcycle. Schwartz leaves the top of the 10-m high ramp at an
angle of 45 degree with a speed of 20 m/s.
a. What are Bob's initial velocities in the horizontal and
vertical direction?
b. What is Bob's initial position in the horizontal and vertical
direction?
c. What is Bob's acceleration in the horizontal and vertical
directions?
d. How long is Bob in the air?
e. How far from...
a. An attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.40 m/s from a height of 1.55 m above the ground. Will the rock reach the top of the wall? If so, how fast is it moving when it reaches the top. If not, what initial speed must it have to reach the top? b. To defend the castle, a rock is thrown downwards from the top of the wall with...