2. What is the kinetic energy of a 3.0 kg book bag just before it hits the floor after a 1.5 m fall? A. 29.4 J B. 44.1 J C. 3.38 J D. Not enough information

Q: A particle moves 5.0 m along the negative y-direction while being acted upon by a constant force…

A: Given : d = -5j m (because it is acting along negative y direction) F = (3i + 4j - 5k) N

Q: 1. A crate of mass 10.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The…

A:

Q: A 2.00-kg (20.0-N) stone is dropped from a height of 5.0 m, and strikes the ground with a velocity…

A: Given data: Mass, m=2 kg Height, h=5 m Velocity, v=8 m/s Question is to find the work done by the…

Q: A 2.00-kg (20.0-N) stone is dropped from a height of 5.0 m, and strikes the ground with a velocity…

A: Weight of stone (w) = 20 N Mass of stone (m) = 2 kg Initial height (h) = 5 m Velocity with which the…

Q: A 5.5 kg bird is flying 12 m above the ground. What is the Potential energy of the bird is…

A: Mass of bird (m) = 5.5 kg Height of bird above ground (h) = 12 m g = 9.8 ms2

Q: A 0.30 kg soccer ball is released from the top of a 10 m building. The ball strikes the ground with…

A: The velocity of a ball freely dropped from a height is given by v = 2gH, where g = acceleration due…

Q: A 15-kg grocery cart is travelling at 4 m/s across a level parking lot. A child runs up to the cart…

A: Write the given values with the suitable variables. m=15 kgu=4 m/sF=12 Nd=3 m Here, m is the mass, u…

Q: 39. A 58 kg pole vaulter needs to vault a height of 6.0 m. Assuming that all his kinetic energy can…

A:

Q: A particle experiences a variable force F= (2+2x+ x^2)N that acts in the x direction. The work done…

A:

Q: How much total mechanical work does a weightlifter do in 10 repetitions of lifting (and lowering)…

A: Total mechanical work is change in potential energy. In this question after 10 repetitions of…

Q: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving down…

A:

Q: 47. A 1500 kg car accelerates from rest to 75 km/h in 45s. How much power is supplied by the engine…

A: Given data: Mass of the car, m=1500 kg Since car starts from rest, we can take initial velocity,…

Q: I need help with these questions

A: 1) mechanical energy is always conserved with certain conditions. Mechanical energy is combination…

Q: A 60-N constant force exerted on a 10-kg object for 12 seconds. The initial velocity of an object is…

A: (a) Calculate the acceleration of the object due to the applied force. a=Fm=60 N×1 kg·m/s21 N10 kg=6…

Q: A 4.21-kg watermelon is released from rest from the roof of an 27.8-m-tall building. a. Calculate…

A:

Q: 9. Consider a 59kg volleyball player who is jumping to spike the ball. Her O position is the bottom…

A:

Q: A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal.…

A: Given: The weight of the object is 80 N. The slope is 30o with horizontal. The displacement of the…

Q: 86. What is the kinetic energy of a 20kg object moving at 2 m/s? * О а. 10 J O b. 20 J О с. 40 J O…

A: Given, Mass of object m = 20 Kg Velocity of object v = 2 m/s

Q: A 72 kg skiier goes down a 45 meter tall hill and reaches 26 m/s at the bottom of the hill. What is…

A:

Q: 1. a brick with mass 30 kg rests a top a 12 m tall wall. What is the brick's gravitational potential…

A: Given: mass of brick, m = 30 kg height of tall wall, h = 12 m

Q: A block of mass 2.0 kg is moving to the left and changes its speed from 1.0 m/s to 3.0 m/s. Match…

A:

Q: A 12 Volt car battery pushes charge through the headlight circuit resistance of 10 ohms. How much…

A: By ohms law  i = V/R

Q: 4. A 2.5 kg object falls vertically downward in a viscous medium at a constant speed of 2.5m/s. How…

A: 4) Given,Mass of object, m = 2.5 kgConstant speed in downward direction = velocity = 2.5 m/sHeight,…

Q: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at…

A: Given- Mass of box (m) = 4 Kg, Velocity of box (v) = 5 m/s Distance traveled (S) = 8 m The…

Q: Young Hector launches a 200 gram block uphill on a frictionless ramp which is tilted at 30 degrees…

A:

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.