Help! All four are incorrect! A 15 kg block is accelerated at 1.6 m/s2 up a...

Question

Question

Help! All four are incorrect!

A 15 kg block is accelerated at 1.6 m/s² up a frictionless plane inclined at 5.0

science physics

Answer 1

Answer #1

time taken to reach the speed 36 m / s from 10 m/ s is t = ( v - u ) / a

= 16.25 s

(a) . the change in the block's mechanical energy = ( 1/ 2) m[v^ 2- u^ 2]

= 8970 J

E =8970 kJ

(b) the average rate at which energy is transferred to the block P = E / t

P = 552 W

(c). instantaneous rate of that transfer when the block's speed is 10 m/s is P ' = Fu

where F = ma

So, P ' = mau = W

(d) instantaneous rate of that transfer when the block's speed is 36 m/s is P " = Fv

P" = mav

= W

Answer 2

Similar Homework Help Questions

5. A block of mass 23 kg moves up a 34° inclined plane by being pulled...

5. A block of mass 23 kg moves up a 34° inclined plane by being pulled by a string attached to a hanging 45 kg mass across a frictionless pulley. There is a coefficient of friction of .2 for the surface and the 23 kg mass. Find the acceleration in m/s2 A) 10.35 m/s2 B) 8.69 m/s2 C) 4.082 m/s2 D) 2.346 m/s E) 3.105 m/s
A block (block 5) of mass m5 = 2.3 kg hangs from the end of a...

A block (block 5) of mass m5 = 2.3 kg hangs from the end of a (massless) string which runs over a (massless frictionless) pulley. The other end of the string is connected to another block (block 4) of mass m4 = 6.1 kg on a surface inclined at an angle of θ = 27o above the horizontal. The situation is shown below. a) Assuming there is no friction between block 4 and the inclined plane, find the acceleration (magnitude...
A 5.0-kg block slides from an initial speed of 8.0 m/s to a final speed of...

A 5.0-kg block slides from an initial speed of 8.0 m/s to a final speed of zero. It travels 12 m down a plane inclined at 15: with the horizontal. Determine the entropy change of the block-inclined plane-Earth system for this process if originally the block and the inclined plane were at 27 degree C. Why did the block stop?

A horizontal force F = 62 N attempts to push a 8-kg block up a frictionless...

A horizontal force F = 62 N attempts to push a 8-kg block up a frictionless plane inclined at an angle of 31 degrees. What is the acceleration of the block along the plane in m/s^2? Round your answer to one decimal place.
Figure 1: Block on incline. 2, A block of mass m = 5 kg is subject...

Figure 1: Block on incline. 2, A block of mass m = 5 kg is subject to a force of magnitude 20 N that makes an angle of p20 with the (frictionless) inclined plane of contact. The plane itself is inclined θ = 300 with the horizontal. (a) What is the acceleration of the block along the incline? (b) If the block begins at rest, in what direction will it move subsequently (i.e., up or down the incline)? (c) If...
Review The 15-kg block is held at rest on the smooth inclined plane by the stop...

Review The 15-kg block is held at rest on the smooth inclined plane by the stop block at A. (Figure 1) Part A If the 10-g bullet is traveling at 300 m/s when it becomes embedded in the 15-kg block, determine the distance the block will slide up along the plane before momentarily stopping. Express your answer using three significant figures and include the appropriate units. Figure < 1 of 1 > UA ? d = 2.933.10 mm Submit Previous...

A cord pulling a cart up along a frictionless plane inclined at angle theta = 15...

A cord pulling a cart up along a frictionless plane inclined at angle theta = 15 degree. The box has mass m = 5.0 kg, and the force from the cord has magnitude T_1 = 25 N. What is the box's acceleration along the inclined plane? Calculate the normal force F_N exerted by the inclined plane towards the cart.
a block of mass m=6.5 kg on a frictionless plane inclined at 42 degrees is pulled...

a block of mass m=6.5 kg on a frictionless plane inclined at 42 degrees is pulled up with constant force F. the block has a constant acceleration of 2.05 m/s^2. a) what magnitude force acted on the block? b) calculate the normal force acting on the block.
A 100-kg block slides up or down a frictionless inclined plane that makes an angle of...

A 100-kg block slides up or down a frictionless inclined plane that makes an angle of 30°. What is the acceleration of the block on the x-direction (parallel to the plane)? What is the magnitude of the normal force on the block?How would the acceleration change if friction is present?

Block 1 (20 kg) is pulled by a rope from left to right up a ramp...

Block 1 (20 kg) is pulled by a rope from left to right up a ramp which is inclined 45 degrees from the horizontal. The rope pulls on block 1 with a force of 360 N parallel to the surface of the inclined plane. The coefficient of kinetic friction between the block and the surface equals 0.2. Assume that the x-axis is parallel to the incline and positive in the direction up the incline. What is the magnitude of the...