Choose the one alternative that best completes the statement or answers the ques
ID: 1638156 • Letter: C
Question
Choose the one alternative that best completes the statement or answers the question. If your automobile runs out of fuel while driving, the engine stops. You don't come to an abrupt stop due to A). gravity. B) the principle of continuation. C) inertia. D) resistance Compared to the recoiling cannon, a fired cannonball has a A) greater momentum. B) smaller speed. C) greater kinetic energy. D) all of the above Dr. Chuck projects a ball horizontally from a lab bench The ball lands on a bullseye marked on the floor a horizontal distance equal to the ball's initial speed A) squared plus its downward speed squared when hitting the floor. B) coupled with its speed of fall. C) multiplied by its time in the air. D) all of the above E) none of the above A 5-kg shark swimming at 1 m/s swallows an absent-minded 1-kg fish swimming toward it at 4 m/s. The speed of the shark after his meal is A) 3/2 m/s. B) 2/3 m/s. C) 1/6 m/s. D) 1/5 m/s. E) 1/2 m/s. Suspend your body from a pair of vertical ropes and the tension in each rope will be A) greater than your weight. B) equal to your weight. C) half your weight. D) none of the above Centripetal force does no work on a circularly-moving object because A) centripetal force has no component in the direction of motion. B) no change in energy occurs. C) rotational energy transfers to kinetic energy. D) none of the above. About 40J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, the force on the crate is about A) 4 N. B) 40 N. C) 10N. D)160N. When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be A) no different. B) more. C) less.Explanation / Answer
2. Option C is correct
3.option C is correct
4. M= 5kg
m= 1kg
V=1m/s
v= 4m/s
From law of conservation of momentum
MV+mv=[m+M]U
Velocity of the shark after meal U =[(5*1)+(1*4)]/(5+1)
U= 9/6=3/2m/s