Work
A car engine applies a force of 65 kN, how much work is done by the engine as it pushed a car a distance of 75 m?
W=4875000
How much kinetic energy does a 4 Kg cat have while running at 9 m/s?
162 J
What is the gravitational potential energy of a 450 Kg car at the top of a 25 m parking garage?
110250 J
Calculate the electric current in a wire, whose resistance is 0.45 Ω, if the applied voltage is 9 V.
20 A
A force does 30000 J of work along a distance of 9.5 m. Find the applied force.
F=3157.9N
What is the mass of an object moving with a speed of 4 m/s and a kinetic energy of 2000 J?
250 kg
What is the change in gravitational potential energy of a 45 kg weight that is moved from 2 m to 18 m on earth? What is it on the moon (g = 1.6 m/s 2 )?
7056 J - Earth
1152 J - Moon
How much voltage is needed in order to produce a 0.25 A current through a 360 Ω resistor?
90 V
How high can a 40 N force move a load, when 395 J of work is done?
D=9.875m
A 400 Kg car has 1.8 x 10 5 J of kinetic energy. How fast is it moving?
30.4 m/s
A 0.25 kg book falls off a 2 m shelf on to a 0.5 m chair. What was the change in GPE?
3.675 J
What is the resistance of a rheostat coil, if 0.05 A of current flows through it when 6 V is applied across it?
120 Ω
How much work is required to lift a 500 kg block 12 m?
W=58800J
How fast is a 3 Kg toy car with 20 J of kinetic energy moving?
3.65 m/s
A 60 kg girl falls off of a waterfall and loses 10 kJ of GPE. What was her height?
17 m
What is the resistance of a rheostat coil, if 0.05 A of current flows through it when 6 V is applied across it?
240 Ω
A 60 N force is applied over distance of 15 m. How much work was done?
W=900 J
A student runs to physics class with a speed of 6 m/s. If the student has 880 J of kinetic energy, what is her mass?
48.9 kg
When a 0.5 kg rock is dropped from a height of 12 m on Planet Z, it loses 45 J of GPE. What is the acceleration due to gravity on Planet Z?
7.5 m/s 2
How much voltage must be applied across a 0.35 Ω wire in order to create a 30 A current?
10.5 V