A 7.80-g bullet moving at 650 m/s penetrates a tree trunk to a depth of 6.50 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet.  N? (b) Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.  s?

Q: A constant horizontal force moves a 50 kg trunk 9.4 m up a 28° Incline at constant speed. The…

A:

Q: A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 140…

A: Given :Mass of projectile is 44 kgAngle of projectile is 30°Initial speed is 140 m/sHeight of cliff…

Q: (a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp equals 746 W) to…

A: It is given that,

Q: A block with mass m = 2.5 kg slides head-on to a spring with spring constant k = 320 N/m . When the…

A: Given data: Mass of the block m = 2.5kg Spring constant k =320 N/m Compressed length x= 25.0 cm…

Q: Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50…

A:

Q: A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 130…

A:

Q: A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 142…

A:

Q: 72. A 1400-kg car ascends a mountain road at a steady 60 km/h, against a 550-N force of air…

A: 72)m = 1400 kg v = 60km/h f = 550 N (friction)P = 38 kW

Q: Problem 8.68 A 1150 kg sports car accelerates from rest to 95 km/h in 7.1 s Part A What is the…

A: Solution: Given that Mass of the car m=1150 kg Initial velocity of car v1​=0 t = 7.1 s Final…

Q: A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 122…

A:

Q: Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50…

A:

Q: A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 136…

A:

Q: A horizontal force F does 80J of work on a 20 Newton box to pull it toward the right along a rough…

A:

Q: A 340 g block is dropped onto a relaxed vertical spring that has a spring constant of k = 2.1 N/cm…

A: NOTE: According to the guidelines we are allowed to answer the first 3 sub-parts of a question. If…

Q: When a 3600-lb automobile runs out of gas, it is pushed by its unhappy driver and a friend a quarter…

A: M = 3600 lb F =175 lb d = 0.250 mi = 1320 ft t = 15 min = 15 × 60 = 900 s

Q: A 360 g block is dropped onto a relaxed vertical spring that has a spring constant of k = 1.0 N/cm…

A: Given that, Spring Constant, k=1.0 N/cm Mass of the Block m=0.36 kg Spring Compresses total =0.17 m

Q: A 4.00 g bullet moving at 610 m/s penetrates a tree trunk to a depth of 46 mm. (a) Use the…

A: Part (a) solution

Q: A bowling ball is dropped from the top of a building that has a height of ℎ=104m.  (a)Using energy…

A:

Q: A worker pushes a 30.0-kg crate a distance of 4.5 m along a level floor at constant velocity by…

A:

Q: A person drags a box across a floor by applying a horizontal force of 10 N. The kinetic frictional…

A: Given: The applied force is F=10 N. The frictional force is Ff=4 N. The displacement is d=0.5 m.…

Q: A 2.50 kg box is pulled by a constant force of 16 N that is exerted at an angle 36.9° above the…

A: given,Iitial speed,vi=0applied force, F=16 Ndistance d=3 mcoefficient of friction= 0.21

Q: A 40.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of…

A: Given data: Mass of the projectile is, m= 40 kg Angle of projection is, θ=300 Initial speed is,…

Q: A 250 g block is dropped onto a relaxed vertical spring that has a spring constant of k =2.5…

A: a)     The required work done by gravitational force is, b)   The required work done by spring…

Q: The work done on a stretching a spring it to 3.50 cm from its equilibrium length is 14.0 J. (a) How…

A: Stretching in spring = 3.50 cm Work done = 14 J

Q: ch work (úin Joules) is done in lifting a 2.5 kg dictionary from the floor onto a shelf 1.9 m high?…

A: Since we only answer upto 3 sub-parts, we will answer the first 3. Please resubmit the question and…

Q: A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 138…

A: Given: The mass of the projectile is 60.0 kg. The angle of projection is 30.0 degrees. The initial…

Q: (a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp = 746 W) to…

A:

Q: A 40.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 130…

A: Given:-  mass of the projectile m= 40 kg  Initial speed v= 130 m/s  h= 132 m  θ=30° Find:- (a) What…

Q: A block with m = 1kg moves up an incline (0-30°) with an initial speed of 10 m/s. Vo (a) If there is…

A: Given data: Mass of block is, m=1 kg . Angle of inclination is, θ=30∘. Initial speed of bock is,…

Q: Suppose the ski patrol lowers a rescue sled and victim,having a total mass of 90.0 kg, down a 60.0º…

A:

Q: A cyclist starts from rest and coasts down a 4.0° hill. The mass of the cyclist plus bicycle is 85…

A: mass of cyclist plus bicycle , m = 85 kg angle of inclination  of hill , θ' = 4o distance traveled…

Q: A block with mass m=2.5 [kg] slides head-on to a spring with spring constant k=320 [N/m]. When the…

A:

Q: A 1900-kg pile driver is used to drive a steel beam into the ground. The pile driver falls 6.00 m…

A: Given: mdriver=1900kgyi,driver=6.09myf,driver=0mvf,driver=vi,driver=0m/sThe distance travelled by…

Q: 6.4 Suppose the worker in Exercise 6.3 pushes downward at an angle of 30° below the horizontal. (a)…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: ASK YOU A 7.80 g bullet is initially moving at 620 m/s just before it penetrates a block of wood to…

A: Given data: Mass of bullet is, m=7.80 g=7.80×10-3 kg. Initial speed of bullet is, u=620 m/s. Depth…

Q: A 40.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 130…

A:

Q: A 2.50 kg box is pulled by a constant force of 16 N that is exerted at an angle 36.9° above the…

A:

Q: To stretch an ideal spring 3.00 cm from its unstretched length, 12.0 J of work must be done. (a)…

A: Work done by spring to stretch or compress by x  is given by,  E=12kx2 J Substitute the given value…

Q: block with mass ?=?.? [kg] slides head-on to a spring with spring constant ?=??? [N/m]. When the…

A: The mass of the block = m The spring constant =K N/m The compressed length = x cm= x/100 meter The…

Q: A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 136…

A:

Q: A 10 kg crate is pulled along a rough inclined plane at an initial velocity of 1.5 m / s. The…

A: Given The mass of crate is m=10 kg. The initial velocity of the crate is v=1.5 m/s. The pulling…

Q: A large cruise ship of mass 6.00 x 10' kg has a speed of 10.4 m/s at some instant. (a) What is the…

A: Given data:Mass of the ship, m = 6.00 x 107 kg.Speed of the ship, v1 = 10.4 m/s

Q: A 340 g block is dropped onto a relaxed vertical spring that has a spring constant of k = 2.1 N/cm…

A:

Q: A 55-kg skateboarder enters a ramp moving horizontally with a speed of 6.5 m/s, and leaves the ramp…

A: m = 55 kg v = 6.5 m/sV = 4.1 m/s

Q: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0º…

A: Work done by a force over a displacement can be calculated using the following relation. W=Fd cosθ…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.