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A 4.13 kg block slides down a 6.09 m long ramp that has an angle of inclination of 28.2° from rest. At the bottom of the ramp, the block is travelling 2.98 m/s. What is the work done by friction on the block as it slides down the ramp?
How much work is required to accelerate a 1.44 kg ball at 2.40m/s 2 for 5.11 m?
A block slides down a ramp from rest. The block starts at 5.71 m off the ground and has a mass of 3.37 kg. Assuming no friction, what is the speed of the block at the bottom of the ramp?
Mini-submarine has the total volume of 50m3. Its mass is 5500kg. Can it carry a load of another 9000 kg?
A stone is launched vertically upwards from ground level with the initial velocity 30 m/s. Assume that the acceleration is 10 m/s².
a. Find the time taken for the stone to return to the ground again. b. Find the maximum height reached by the stone.
c. Find the velocity with which it hits the ground. d. Sketch the position-time graph and the velocity-time graph for the
motion.
P-3
e. Find the distance covered by the stone from the launch to when it
returns to earth.
A football match between two college teams, the referee ordered a free kick. The ball of mass 1.5kg was placed at rest. The kick was about to be taken by an eager footballer. What was the potential energy of the ball just before the kick was taken?
An asteroid with a diameter of 11km and a mass of 4.3 x 1015 kg impacts the earth at a speed of 31414m/s, landing in the Pacific Ocean. If 1.23% of the asteroid's kinetic energy goes to boiling the ocean water (assume an initial water temperature of 12°C), what volume of ocean water in L) will be boiled away by the collision? Assume ocean water is just plain water.
the footballer kicked the ball and it was caught by the opposing goalkeeper, 4m above ground. The ball was travelling at 10m/ calculate the kinetic energy of the ball just before it was caught.
If a circuit contains three 60 Ω resistors in parallel and has a total voltage of 120 V what is the total resistance of the circuit and the total current? How many electrons does this charge represent?
Sadie is holding onto a Van de Graff generator trying to get a shocking new hairdo. By doing this, Sadie gets an excess of 6.4 x 1020 electrons. What is the charge on Sadie? If she holds on for 10 minutes what is the current running through Sadie.
