Question 4. A skateboarder of mass m approaches a ramp with height H and an incline angle of 0. You may ignore friction throughout this problem.
Q: A 2.78kg crate starts from rest and slides down a frictionless ramp whose angle is 14.4° with the…
A: Every object on Earth is being pulled down to the surface of the Earth by virtue of the…
Q: A 7.80 g bullet is initially moving at 470 m/s just before it penetrates a tree trunk to a depth of…
A: Given Data: The mass of the bullet is, m = 7.80 g. The initial velocity is, v = 470 m/s. The…
Q: When working on a slippery, angled surface, such as a roof, is a heavier or lighter person more…
A: Required : If a heavier or lighter person more likely to slip ?
Q: A 7.80 g bullet is initially moving at 530 m/s just before it penetrates a block of solid rubber to…
A: Given data:Mass of the bullet (m) = 7.8 gInitially moving (v) = 530 m/sDepth of penetration (d) =…
Q: An object of mass m=2kg starts from rest and moves down along an incline as shown in the figure…
A:
Q: The figure to the right shows a pool slide of length 5.50 m. The end point of the slide is at 30.0…
A: Length of pool slide = 5.50 m height of end point of slide above water level = 30 cm mass of child =…
Q: A 280 g block slides down an incline plane of inclination angle 14 degrees with a constant speed.…
A: Given a 280 g (m) block slides down an incline plane of inclination angle 14 degrees(θ) with a…
Q: You are travelling along a road at night at a constant speed of 20 m/s. Your maximum visibility…
A:
Q: A 4.0 kg block starts with a speed of 15 m/s at the bottom of a plane inclined at 33° to the…
A:
Q: A sled of mass m is being pulled horizontally by a constant upward force of magnitude F that makes…
A:
Q: A hand pushes a 10 kg block along a table from point A to point C as shown in the figure below. The…
A:
Q: he roller coaster cart has a mass of 350 kg. Start your motion from rest at point A. Assuming no…
A:
Q: You and your friends push a 400 kg piano across a hardwood floor at a constant speed. You all push…
A:
Q: The spring shown in the figure is compressed 51 cm and used to launch a 100 kg physics student. The…
A:
Q: In the figure, a block is released from rest at height d = 36 cm and slides down a frictionless ramp…
A: Initially, the block is at rest, its kinetic energy is zero, it has only its potential energy. When…
Q: If the four Pratt & Whitney PW4000 turbofan engines of a Boeing747-400 aircraft do 5.62 Million…
A:
Q: 3. A skateboarder with a mass of 55.0 kg prepares to skate a down a ramp with an angle of incline of…
A: Given m=55.0kg, θ=35.0⁰, μ=0.300 u=3.00m/s H=1.75m
Q: **86. Conceptual Example 9 provides background for this problem. A swing is made from a rope that…
A:
Q: An applied force of 122 N is exerted horizontally on an 28 kg box of cat in yulin. The coefficient…
A:
Q: A person with mass m is skateboarding across level ground on earth with a speed vo when they come to…
A:
Q: A box is given a push across a horizontal surface. The box has a mass m, the push gives it an…
A: Given value--- initial speed ( u ) = vi . coefficient of kinetic friction = muk . final speed ( v )…
Q: Two crates of mass m1 = 50 kg and m2 = 24 kg are connected by a rope that passes over a massless,…
A:
Q: A block with a mass of 0.316 kg slides across a table with an initial speed of 1.65 m/s. It has a…
A:
Q: At an accident scene on a level road, investigators measure a car’s skid mark to be 35 m long. The…
A: Given information: The distance through which skidding occurred (d) = 35 m The coefficient of…
Q: An Amazon package (2 kg) starts from rest, then begins to slide down a 4 m tall ramp that is…
A: Given,Mass of the Amazon package (m): 2 kgHeight of the ramp (h): 4 mInclined angle of the ramp ():…
Q: As shown in Figure P8.20, a green bead of mass 25 g slides along a straight wire. The length of the…
A: Part a: The potential energy of the bead at point A is converted into kinetic energy at point B but…
Q: A tadpole swims across a pond at 3.50 cm/s. The tail of the tadpole exerts a force of 28.0 mN to…
A:
Q: A box of mass m = 9.3 kg is released from rest at the top of a track that is frictionless except for…
A:
Q: Calculate the force (in N) needed to bring a 1050 kg car to rest from a speed of 80.0 km/h in a…
A:
Q: ->> 100 m◆v=0 Answer: frictionless friction only here Answer: M Starting from rest, a small block of…
A:
Q: box is placed at the top of an incline at an angle 21.8 degrees to the horizontal. When released the…
A:
Q: A hockey puck is given an initial speed of 4.8 m/s If the coefficient of kinetic friction between…
A: GIven: The intial speed of the puck is 4.8 m/s. The coefficient of kinetic friction is 0.05. The…
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images
- A girl on a skateboard (total mass of 40 kg) is moving at a speed of 12 m/s at the bottom of a long ramp. The ramp is inclined at 13° with respect to the horizontal. If she travels 13.9 m upward along the ramp before stopping, what is the net frictional force (in N) on her? (Assume the positive direction is upward along the ramp. Indicate the direction with the sign of your answer.)Problem 10: The speed of a block traveling on a horizontal frictional surface changes from v; =16 m/s to v= 11 m/s in a distance of d = 8.5 m.A 7.80 g bullet is initially moving at 650 m/s just before it penetrates a tree trunk to a depth of 4.70 cm. (a) What is the magnitude of the average frictional force (in N) that is exerted on the bullet while it is moving through the tree trunk? Use work and energy considerations to obtain your answer. b) Assuming the frictional force is constant, how much time (in s) elapses between the moment the bullet enters the tree trunk and the moment it stops moving?
- A 4kg block was released from rest on top of a quarter circular surface. If the vertical height from A to B is given as 4m as shown below, How far from point B will the block reach if the surface A to B is frictionless while B to C has a coefficient of friction of 0.45? answer must be in meters.Subject :- Physicsrough surfice Smooth Swace feed 2.50m he 3.00m E; Ei + WNc m A 34.2 kg block slides with a velocity of 10.22 m/s to the right on a frictionless surface (as shown in the figure above). The block slides up a slope to a height of 3.00 m and then slides across a 2.50 m long rough surface with a coefficient of kinetic friction equal to 0.325. The block continues to travel to the right and bumps into a massless spring with a spring constant (k) equal to 2320 N/m. a) How much does the spring get compressed by the block with respect to its equilibrium length? Please answer with a positive number in units of metres, with 3 sig figs. Start with conservation of energy: Er = Ei + WNC , and show all steps. b) What is the potential energy stored by the spring when the mass comes to a stop? Please show the symbolic equation and then “plug in the numbers" to give a numerical answer in units of joules with 3 sig figs. c) What happens to the potential energy stored in the spring after the block stops…
- A 13.0kg stone slides down an icy, essentially frictionless, hill that is shown in the figure. At the top of the hill, the stone is moving at 1.75m/s down the hill. While the hill is frictionless, the stone experiences friction along the level, rough ground (beyond the base of the hill) all the way to a wall. The coefficients of static and kinetic friction are 0.800 and 0.300 respectively. The stone slides along the ground for 9.15m before making contact with a long spring, which has a spring constant of 25.0N/m. (“Long” in this case means that the spring is sufficiently long to stop the stone before it hits the wall.) Will the stone move again after it has been stopped by the spring?Please use conservation of energy (kinetic and gravitational potential energy) to solve this problem. A 1.5-kg block initially at rest at the top of a 3-m incline with a slope of 30° begins to slide down the incline. The upper half of the incline is frictionless, while the lower half is rough, with a coefficient of kinetic friction μk = 0.3. (a) How fast is the block moving midway along the incline, before entering the rough section? (b) How fast is the block moving at the bottom of the incline?A 4.25 kg block is projected at 5.40 m/s up a plane that is inclined at 30.0° with the horizontal. The block slides some distance up the incline, stops turns around and slides back down to the bottom. When it reaches the bottom of the incline again, it is traveling with a speed of 3.80 m/s. If the coefficient of kinetic friction between the block and the plane is 0.500, how far up the incline did the block slide?
- 7.43 - A 2.0-kg piece of Figure P7.43 wood slides on a curved surface Wood (Fig. P7.43). The sides of the surface are perfectly smooth, but the rough horizontal bottom is 30 m long and has a kinetic friction coefficient of 0.20 with the wood. The piece of wood starts from rest 4.0 m above the rough bottom. (a) Where will this wood eventually come to rest? (b) For the motion from the initial release until the piece of wood comes to rest, what is the total amount of work done by friction? Rough bottomA penguin slides down an icy incline on his stomach, as shown in the diagram below. The coefficient of kinetic friction between the incline and the penguin's stomach is 0.15. The angle of the incline is 0 = 25 degrees. The total distance down the incline is 25 meters. The penguin gets a running start so his speed is 2.5 m/s when he begins to slide down the incline. What is the penguin's speed when he reaches the bottom of the incline? Hint: use Newton's 2nd law to calculate the acceleration of the penguin on the incline, then use kinematic equations to calculate the speed of the penguin when he reaches the bottom. 2.5 m/s 25 m 25°Calculate the force needed to bring a 900 kg car to rest from a speed of 90.0 km/h in a distance of 110 m (a fairly typical distance for a nonpanic stop).N(b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a), i.e. find the ratio of the force in part(b) to the force in part(a).(force in part (b) / force in part (a))