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Q.A famous zoologist was hunting antelope for a zoo with a dart gun that fired darts with a range of 100 m at a speed of 25 m/s. If he shot a dart at an antelope at rest 50 m away, and the antelope instantly began to accelerate at a constant rate away from the dart, running out of range of the dart just in time. Find the minimum acceleration of the antelope.
Q. A 61 g bullet traveling at 280 m/s penetrates a block of ice at 0 C and comes to rest within the ice.
Assuming that the temperature of the bullet doesn't change appreciably, how much ice is melted as a result of the collision?
compute the distance from the central maximum to the first bright region on either side of the central maximum.
A cylinderical water tank of radius 10ft and height 30ft is half filled with water. How much work is essential to pump all of the water out through a hole in the top of tank.
A car of mass 1110 kg travels at a speed of 20 ms-1 along a straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.83. Take the acceleration due to gravity to ..
Two cicadas, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 , while Milada jumps horizontally with an initial speed of 98.
A car traveling at 24 m/s runs out of gas while traveling up a 9 degree slope. How far will it coast before starting to roll back down.
A box slides down a 36° ramp with an acceleration of 1.26 m/s2. find the coefficient of kinetic friction between the box and the ramp.
What is the horizontal distance between elbow and the point where the weight of the forearm acts.
A spring with spring constant 13 N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 8.5cm and free. The ball makes 26 oscillations in 18 s seconds.
Describe Erikson, Levinson, cognitive developmental theorists, Kohlberg, behavioral theorists, Bronfenbrenner, Holland, the eclectic theory, and composite theory.
A child is riding across a rough field on a sled. Together, she and the sled have a mass of 73 kg. The sled is being pulled by her brother at an angle of 16º with a force of 356 Newtons. What is her acceleration if the coefficient of kinetic friction..
A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14m/s, the total force exerted on the driver has magnitude 120 N. What are the magnitude and direction of the total vector force exerted on the driver i..
what is the maximum amount the spring may be stretched and the box remain at rest.
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