6.50 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)? (Enter a number.)

A 6.00 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)?  ____________________ N/m   My answer is 37500 N/m which is marked as wrong. How can I solve this problem.

A 6.50 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.600 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)?

When an 8.00-kg stone is at rest on a spring, the spring is compressed by 10.0 cm. The stone is pushed down an additional 30.0 cm and released. What is the maximum height reached by the stone, measured from the release point?

The spring force is initially greater than friction, so the block accelerates forward. But eventually the spring force decreases enough so that it is le (decelerates). In a physics lab experiment, one end of a horizontal spring that obeys Hooked's law is attached to a wall. The spring is compressed æo = 0.400 m, and a block with mass 0.300 kg is attached to horizontal surface. Electronic sensors measure the speed v of the block after it has traveled a distance d from its initial position against the compressed spring. The measured The spring is then released, and the block moves along a O The spring force is always less than friction, so the block decelerates all the time. values are listed in the table below. Submit Previous Answers d (m) v (m/s) v Correct 0.05 0.85 0.10 1.11 Part B 0.15 1.24 0.25 1.26 Use the work-energy theorem to derive an expression for v? in terms of d. Do not substitute the value of æo into the expression. 0.30 1.14 0.35 0.90 Express your answer in terms of some…

An elevator car of mass 815 kg falls from rest 2.80 m, hits a buffer spring, and then travels an additional 0.360 m, as it compresses the spring by a maximum of 0.360 m. What is the force constant of the spring?

68. A block of mass 12.0 kg slides from rest down a friction- less 35.0° incline and is stopped by a strong spring with k = 3.00 x 104 N/m. The block slides 3.00 m from the point of release to the point where it comes to rest against the spring. When the block comes to rest, how far has the spring been compressed?

A 3.00 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.300 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)?

A 4.50 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.600 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)? (Enter a number.) ___N/m

A 6.00 ✕ 105 kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. What is the force constant k of the spring (in N/m)? (Enter a number.)