A 24 g pickleball leaves the paddle with a speed of 18 m/s (assuming the ball started at rest). The paddle pushes the ball for a distance of 15 cm. a. What is the average force of the paddle on the ball? b. If the ball were served straight up what is the maximum height would reach? 5 mm 5 m/s B 8 m
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- 3. A skier of mass m starts from rest at the top of a frictionless, snow covered hill angled at 0 above the horizontal. The ski down the hill a distance du and onto a flat parking lot. The coefficient of friction between the cement in the parking lot and the skis is μk. They move along the parking lot a distance dR before stopping. This is drawn below a. Derive an equation for the skier's speed at the bottom of the hill.. b. Derive an equation for dr, the distance the skier slides into the parking lot before stopping. c. If there was a little friction between the snow and skies, explain how your solution would change. You should not re-solve the problem, just describe how your methods would need to change. dH e dRA bowling ball is dropped from the top of a building that has a height of h = 104 m. a. Assuming air resistance is negligible, what is the ball's speed, vf in m/s, when it strikes the ground? b. If drag produces an opposing force of 10 N while the ball's falling, what is the ball's speed, vf in m/s, when it strikes the ground? Assume the ball has a mass of 5 kg. c. A different ball was dropped and the final speed was measured to be vf = 8.5 m/s while the drag force was measured to be 50 Newtons. What is the mass of this ball in kg?A 25g ball slides down a smooth inclined plane 0.850 m high that makes an angle of 35 degrees with the horizontal. The ball slides down into an open box of 150 g mass. The ball and the box slide off the end of a table 1.0 m high. a.) How far from the base of the table will the box and ball hit the ground? b.) What is their final velocity?
- 75. ao A net external force is applied to a 6.00-kg object that is initially at rest. The net force component along the displacement of the object varies with the magnitude of the displacement as shown in the drawing. What is the speed of the object at s = 20.0 m? F cos e 10.0 N 5.00 N 10.0 m 20.0 m42. John is moving a 14 kg box in a Phsyics lab on an approximately frictionless surface. If the box is initially at rest and zaim applies a force of 15 N for 4.7 s, what would be the speed of the box at the end of the 4.7 period? А. 30 m/s В. 12 m/s C. 2.7m/s D. 1.8 m/s E. 5.0 m/sA 25g ball slides dowm a smooth inclined plane 0.850 m high that makes an angle of 35 degrees with the horizontal. The ball slides down into an open box of 150 g mass. The ball and the box slide off the end of a table 1.0 m high. a.) How far from the base of the table will the box and ball hit the ground? b.) What is their final velocity?
- Mike pushes a box with a mass of 6.41 kg giving it an initial velocity of 2.49 m/s. The box comes to rest after sliding for 2.33 meters because of the frictional force exerted between the surface and the box. What is the frictional force on the box?An antitank weapon fires a 3.00-kg projectile which acquires a speed of 50.0 m/s after traveling 90.0 cm down a launching tube. Assuming the projectile was accelerated uniformly, what was the average force that acted on it? a. 4.17×(10^3)N b. 3.62×(10^3)N C. 2.82×(10^3)N d. 2.00×(10^3)NCurling is a sport played with 20 kg stones that slide across an ice surface. Suppose a curling stone sliding at 1 m/s strikes another, stationary stone and comes to rest in 2 ms. Approximately how much force is there on the stone during the impact?A. 200 N B. 1000 N C. 2000 N D. 10,000 N
- An empty sled of mass 25 kg slides down a muiddy hill with a constant speed of 2.4 m/s The slope of the hill is inclined at an angle of 15 degrees with the horizontal. a. Calculate the frictional force on the sled as it slides down the slope b.Calculate the coefficient of friction between the sled and the muddy surface of the slope c. The sled reaches the bottom of the slope and continues of horizontal ground. Assume the same coefficient of friction. In terms of velocity and acceleration, describe the motion of the sled as it travels on horizontal ground.A soccer player kicks a stationary 0.425 kg ball giving it a speed of 13.7 m/s. The player’s foot is in contact with the ball for 0.097 second. What is the average force when the player kick the ball? a. 6 N b. 5.8 N c. 60 N d. 84 NA particle of mass 6kg moves according to the equation x (t) =10t², where x is in meters and t is in seconds. The net force acts on the particle is Select one: a. 112N b. 120N c. 118N d. 124N