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2. A ball rolling down a hill is...
A rock is sliding down a hill. As the rock is sliding down the hill, the...
A rock is sliding down a hill. As the rock is sliding down the hill, the ____________ is doing work and coverts ___________ to _____________ . a . friction; gravitational potential energy; kinetic energy. b. friction; kinetic energy; gravitational potential energy c. normal force; chemical energy; gravitational potential energy. d. weight; chemical energy; gravitational potential energy. 3. weight; gravitational potential energy; kinetic energy.
When an object is rolling, movement involves rotation and translation. Mark the true statement about this...
When an object is rolling, movement involves rotation and translation. Mark the true statement about this situation. a)When an object is rolling, movement involves rotation and translation. Mark the true statement about this situation. The total mechanical energy is equal to the sum of the translational kinetic energy with the gravitational potential energy of the object. b)The kinetic energy of translation may be zero. c)The gravitational potential energy can not remain constant d)The kinetic energy of rotation can not vary....
A ball is thrown vertically upward. Neglecting air resistance, which one of the following statements is...
A ball is thrown vertically upward. Neglecting air resistance, which one of the following statements is FALSE. Select one: a. The kinetic energy of the ball decreases while the ball is going up. b. The sum of the kinetic energy and gravitational potential energy of the ball is constant. C. The kinetic energy of the ball increases when the ball is coming down. d. The gravitational potential energy decreases as the ball is going up
5. A 1000-kg car is at the top of a hill as shown, where its elevation...
5. A 1000-kg car is at the top of a hill as shown, where its elevation above the bottom of the hill is 120 m. a. What is its gravitational potential energy? 120 m b. If the cart starts from rest and rolls down the hill with negligible friction and air resistance, what will its kinetic energy be when it reaches the bottom? c. What will be its speed when it reaches the bottom? Suppose instead that there is noticeable...
2. Rolling down the hill (a) A solid cylinder of mass 1.0 kg and radius 10...
2. Rolling down the hill (a) A solid cylinder of mass 1.0 kg and radius 10 cm starts from rest and rolls without slipping down a 1.0 m-high inclined plane. What is the speed of the cylinder when it reaches the bottom of the inclined plane? (b) How about a solid sphere of the same mass and radius? (c) How about a hoop of the same mass and radius? (d) Which of the above objects is moving fastest when it...
7) A) Balance the following reaction: __H2SO4 + __NaOH __Na2SO4 + __H2O b) Classify the...
7) A) Balance the following reaction: __H2SO4 + __NaOH __Na2SO4 + __H2O b) Classify the following as Kinetic or Potential energy: Example KE or PE? 1. A bicyclist pedaling up a hill 2. An archer with his bow drawn 3. A volleyball player spiking a ball 4. A baseball thrown to second base 5. The chemical bonds in sugar 6. The wind blowing through your hair 7. Walking down the street 8. Sitting in the top of a tree ...
9 The ball is allowed once more to slide down the slide-slot, starting at rest from...
9 The ball is allowed once more to slide down the slide-slot, starting at rest from point R. However, this time the slide-slot is unconstrained horizontally so that it is free to slide on the table. While sliding, the ball is always in contact with the slide-slot. The mass of the slide-slot is 500 g. gravitational acceleration (g) of a free-falling object is 10 m s-2. As the ball slides down the curved surface, from point R to point T,...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a net external force of zero. 2)TF Momentum is conserved in an isolated system. 3) TT The definition of work is W = Fdcos(0) 4) T (F) The spring force is proportional to the displacement of the spring end. 5) O T Engines and generators can be 100% efficient. 6) DF The impulse is equal to the change in momentum. 7) DF In an isolated...
Group Activity: Ball rolling down ramp and off cliff As shown in the figure below, a hollow ball ...
Group Activity: Ball rolling down ramp and off cliff As shown in the figure below, a hollow ball with a mass m 5.00 kg and radius r -30.0cm starts from rest and rolls a distance of 1.2 m down a 30° ramp, before reaching a flat section at the bottom of the ramp. The ball then rolls along the flat section for 1.0 m before rolling off a 2.5 m-high cliff. The ball lands a distance d from the bottom...
Problem -2 A hollow ball of radius 0.5 m and mass 4.5 kg is rolling without...
Problem -2 A hollow ball of radius 0.5 m and mass 4.5 kg is rolling without slipping on a level surface at a constant speed of 4.0 m/s. The ball rolls up a 40- ramp and eventually stops before rolling back down. (the moment of inertia of a hollow ball of mass M and radius RisMR2) Find: (a) the angular (rotational) speed of the ball (in rad/sec) just before it begins to move up the ramp: (b) the rotational kinetic...
A ball is thrown vertically upward. Neglecting air resistance, which one of the following statements is FALSE. Select one: a. The kinetic energy of the ball decreases while the ball is going up. b. The sum of the kinetic energy and gravitational potential energy of the ball is constant. C. The kinetic energy of the ball increases when the ball is coming down. d. The gravitational potential energy decreases as the ball is going up
5. A 1000-kg car is at the top of a hill as shown, where its elevation above the bottom of the hill is 120 m. a. What is its gravitational potential energy? 120 m b. If the cart starts from rest and rolls down the hill with negligible friction and air resistance, what will its kinetic energy be when it reaches the bottom? c. What will be its speed when it reaches the bottom? Suppose instead that there is noticeable...
2. Rolling down the hill (a) A solid cylinder of mass 1.0 kg and radius 10 cm starts from rest and rolls without slipping down a 1.0 m-high inclined plane. What is the speed of the cylinder when it reaches the bottom of the inclined plane? (b) How about a solid sphere of the same mass and radius? (c) How about a hoop of the same mass and radius? (d) Which of the above objects is moving fastest when it...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a net external force of zero. 2)TF Momentum is conserved in an isolated system. 3) TT The definition of work is W = Fdcos(0) 4) T (F) The spring force is proportional to the displacement of the spring end. 5) O T Engines and generators can be 100% efficient. 6) DF The impulse is equal to the change in momentum. 7) DF In an isolated...
Group Activity: Ball rolling down ramp and off cliff As shown in the figure below, a hollow ball with a mass m 5.00 kg and radius r -30.0cm starts from rest and rolls a distance of 1.2 m down a 30° ramp, before reaching a flat section at the bottom of the ramp. The ball then rolls along the flat section for 1.0 m before rolling off a 2.5 m-high cliff. The ball lands a distance d from the bottom...
Problem -2 A hollow ball of radius 0.5 m and mass 4.5 kg is rolling without slipping on a level surface at a constant speed of 4.0 m/s. The ball rolls up a 40- ramp and eventually stops before rolling back down. (the moment of inertia of a hollow ball of mass M and radius RisMR2) Find: (a) the angular (rotational) speed of the ball (in rad/sec) just before it begins to move up the ramp: (b) the rotational kinetic...
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