4) A stone thrown into the air from the edge of a vertical cliff, as shown in figure. Use information from the figure to find a) The initial speed of the stone, and b) The maximum height of the stone that can reach from the ground. h n ground
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- An automobile approaches a barrier at a speed of 20 m/s along a level road. The driver locks the brakes at a distance of 50 m from the barrier. What minimum coefficient of kinetic friction is required to stop the automobile before it hits the barrier? a. 0.4 b. 0.5 c. 0.6 d. 0.7 e. none of choicesA mass, starting from rest, falls a distance x in t seconds, achieving a velocity v. What is the additional distance fallen, after the mass has already fallen the x distance, when the velocity is doubled? Use g=10 m/s2a) To what height will a 450 g soccer ball rise if it is kicked directly upward at 8 m/s? b) Neglecting wind resistance, use your kinematic equations to determine how long does it take for the ball to get to the top of it's trajectory? c) What is the hang time of the ball? Round answers to nearest hundredth.
- A ball is thrown at an original speed of 8.0 m/s at an angle of 35 degrees above the horizontal. What is the speed of the ball when it returns to the same horizontal level? A) 4.0 m/s B) 8.0 m/s 16 m/s D) 9.8 m/sPhysics HW need help,how to find initial speed?A 2 kg watermelon is dropped from rest from a 6 m tall roof. a) Draw a sketch of the scenario. b) How fast will the watermelon be moving as it strikes the ground below? c) Determine how long it took the watermelon to strike the ground. Round your answer to the nearest tenth. d) What was the watermelon's PE(J), before being dropped? e) What was the watermelon's KE(J) when it struck the ground and f) What was the Total Energy-TE(J)?
- DIRECTIONS: Read the questions carefully. Choose the letter of the correct answer for each item. 1.Two objects of the same size but unequal in weight are dropped from the top of a building. Neglecting air resistance, which will hit the ground first? A. Lighter object B. Heavier object C. Both will hit the ground at the same time D. The lighter object will hit the ground twice faster than the other 2. As the ball travels upwards, at which point will it experience the least velocity? C. As it reached its highest point D. As it travels downward A. As it leaves the hand of the referee B. As it travels halfway 3. Which of the following statements is NOT TRUE about Projectile Motion? A. Horizontal velocity of projectiles is constant B. It is a combination of two independent motions - vertical and horizontal C. The motion of the projectile released vertically downward is accelerated D. Both horizontal and vertical velocities are constantWhich of the following situations could be represented by the energy bar chart below? K₁ Ugy Us₁ I I I I I I W K2 U92 Us2 AUint A ball is dropped from a certain height. t₁ is just before it is dropped and t2 is just before it hits the floor. The system is just the ball A ball is dropped from a certain height. t₁ is just before it is dropped and t2 is just before it hits the floor. The system is just the ball and the Earth A wooden block at rest on a rough surface is pushed so that it moves at constant speed. t₁ is at the beginning when it is moving and t2 is at the end when it is still moving. The system is the block, the surface and the Earth.PROJECTILE MOTION QUESTION: Merida is attempting to tie a rope to a tree. She intends to tie the rope from a limb 5.70 meters above the ground. The issue is that there is another branch 0.90m above where Merida wants the string to be hung. If Merida is 5 meters away from the stem and releasess the rope 0.70 meters above the ground at a 65-degree angle from horizontall, Calculate the beginning velocity range that will allow Merida to hang the string from the lower branch.
- A basketball player jumps straight up for a ball. To do this he lowers his body 0.28 m then accelerates through this distance b forcelly straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.92 m above the floor. For this problem use a coordinate system where up is positive. A) Calculate his velocity when he leaves the floor in m/s B) Calculate his acceleration in m/s2, while he is straightening his legs.He goes from zero to the velocity found in part(a) in a distance of 0.28 m C) Calculate the magnitude of the force he exerts on the floor to do this, in newtons, given that his mass is 112kgResources %= LG An average froghopper insect has a mass of 11.5 mg and reaches a maximum height of 298 mm when its takeoff angle is 57.0" above the horizontal. What is the takeoff speed up of the froghopper? m/s CA block is launched up an inclined plane. After going up the plane, it slides back down to its starting position. The coefficient of friction between the block and the plane is 0.3. The speed of the block when it reaches the starting position on the trip down: A.) is the same as the launching speed. B.) cannot be compared to the launch speed with the information given. c.) is greater than the launching speed. D.) is less than the launching speed.