• ### Ineed fast help for my exam please?

When a flea (m = 450 μg) is jumping up, it extends its legs 0.5 mm and reaches a speed of 0.40 m/s in that time. Part A How much work did the flea do during that time? Use g = 10 m/s2 How much work did the flea do during that time? Use = 10 3.8×10−2 mJ 3.8×10−5 mJ 3.6×10−5 mJ 2.3×10−6 mJ
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Two masses, 4.0 kg and 6.0 kg, are connected by a rope over a frictionless pulley as pictured in the diagram.The ramp is inclined at 30.0º.?

Determine the minimum coefficient of static friction that will prevent this system from moving assuming the natural tendency of the system is for the 4.0 kg block to slide down the incline. Include FBD’s of both masses (4 marks)THE MASS OF THE ROPE IS NOTHING
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Web assign physics?

Homer catches a donut that has a mass of 0.21-kg using a force of 141 -N to stop the donut so he can eat it. If the donut was traveling at a speed of 6 m/s right before it Homer stuck out his hand, how long is s did it take to come to a complete stop?
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Forces question?

24. A three-tiered birthday cake rests on a table. From bottom to top, the cake tiers weigh 16 N, 9 N, and 5 N, respectively. What is the magnitude and direction of the normal force acting on the second-tier?
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Describe the correlation between the speed of light, index of refraction and angle of refraction in different media...?

3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Physics help... 2 questions?

Gordie hits a stationary hockey puck that has a mass 0f 0.4 kg with a force of 1208 N. If the puck moves towards the net with a speed of 30 m/s, how long in sec was the stick in contact with the puck? A pitcher throws a ball with a velocity of 21 m/s. An intrepid softball player who also happens to be taking physics hits the ball so that leaves... show more
3 weeks ago
Be the first one to answer
• Edit
• We are experiencing some problems, please try again.
• ### How long does it take from light to travel 4350 miles?

3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### A spring with a force constant of 89 N/m is compressed 8.7 cm and placed between two stationary carts of mass 1.0and 1.5 .No friction?

2. A spring with a force constant of 89 N/m is compressed 8.7 cm and placed between two stationary dynamics carts of mass 1.0 kg and 1.5 kg. If friction is negligible, determine the final speed of the more massive cart when the spring is released. (4 marks)
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### If a brick is put on a sandpaper ramp the coefficient of static friction between the two materials . How can this be found with one measure?

3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Can Argon become a plasma and if so what temperature in Kelvin would that happen at?

3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Need some help in solving the following problem.?

3 weeks ago
• Edit
• We are experiencing some problems, please try again.

If the man jumps with his knees and an- kles locked, the only cushion for his fall is approximately 0.44 cm in the pads of his feet. Calculate the magnitude of the average force exerted on him by the ground in this situation. Answer in units of N.
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Physics Help!?

A 1.0 kg object is attached to a string 0.50 m. It is twirled in a horizontal circle above the ground at a speed of 5.0 m/s. What is the magnitude of the centripetal force acting on the object? (5 points) 2.5 N 10. N 25 N 50. N
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### You're on a square shaped raft. You've jumped into the river at velocity 2m/s. What will be the velocity of center of mass of the raft?

You have jumped perpendicularly from the raft.
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Physics help?

A car starts from rest and travels for 7.4 s with a uniform acceleration of +2.2 m/s2 . The driver then applies the brakes, causing a uniform deceleration of 1.8 m/s2 . If the brakes are applied for 2.4 s, how fast is the car going at the end of the braking period? Answer in units of m/s. How far has it gone from its start? Answer in units of m
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### An object is placed 30cm in front of a concave lens which has a focal length of 10cm. Determine the position of the image formed?

I did 1/u + 1/v = 1/f 1/30 + 1/v = 1/10 1/v = 1/10 - 1/30 = 1/15 v = 15cm How come the answer is -7.5cm?
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### What is simple pendulum?

3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### A rope pulls a 72.5 kg skier up...?

A rope pulls a 72.5 kg skier up a 21.7 degrees slope with mu = 0.120. The rope is parallel to the slope, and exerts a force of 383 N. What is the acceleration of the skier?
3 weeks ago
• Edit
• We are experiencing some problems, please try again.
• ### Physics refraction?

https://imgur.com/a/iUsMR Answer is 11.35cm n = (real depth)/(apparent depth) = sin i/sin r I'm really stuck. Thanks.
3 weeks ago