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A car is moving at uniform acceleration. Its velocity after traveling for 2 seconds is 4m/s
and is found 12 meters from where it started. If the car’s velocity at 5 seconds is 10 m/s,
determine (a) the car’s acceleration, (b) its displacement at t = 5 seconds measured
from its starting point and (c) its velocity at the start.
Hannah with a mass of 56.2 kg) is traveling at a speed of 12.8 m/s at the top of a 19.5-m high roller coaster Loop in a THEME park.
Find the following:
A. Hannah’s kinetic energy at the top of the loop.
B. Hannah’s potential energy at the top of the loop.
C. Assuming negligible losses of energy due to friction and air resistance, determine Hannah’s total
mechanical energy at the bottom of the loop (h=0 m).
D. Determine Hannah’s speed at the bottom of the loop.
Find the concentration of solution made by dissolving 2.50 g of sodium carbonate in 650 g of water?
What will be the final temperature if a 4 x 10⁷ J of heat is transferred to a 1 kg block of aluminum initially at 20°C
Why does the conductor nees to be isolated from earth before charging?
A mass is hung at the end of the spring length of 14 cm. The mass was pull down
and extend to the quarter of the original length of the springs and released so that
it oscillates vertically. If the mass took 0.125 s to go up and down from
equilibrium point:
a) The acceleration when the displacement is at maximum.
A pile of mass 50kg is being driven into the ground by a hammer of 400 kg. If the hammer is dropped through a height of 3.5m, there is no observable rebound, and the average resistive force of the ground on the pile is 50kN, calculate the distance the pile sinks into the ground.?
if an electric field strength greater than 3.0*10^6 N/C is enough to cause conduction between the plates , find the maximum charge either of the plates can hold without conduction
A railway truck of 100kg mass traveling with a velocity of 7ms-1 collides with a second truck of 200kg mass and the two couple automatically and move off together. Calculate the velocity of the coupled trucks and the energy lost to the system; if the second truck has a speed of 5ms-1 (a) in the same direction, (b) in the opposite direction and (c) is initially stationary.
A 500Mg tug is towing a 1000Mg barge at a steady speed of 3ms-1 when the towline, which is horizontal, is winched in at a rate of 0.5ms-1, what is the tug’s speed during this operation?
#333702 on Dec 2022