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A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed “vo”. If the woman doubles the constant horizontal force that she exerts on the box to push it on the same horizontal floor, the box then moves:

Figure below shows the velocity of a train as a function of time. kinematics-graph.pngAt what time was its velocity greatest? During what periods, if any, was the velocity constant? During what periods, if any, was the acceleration constant? When was the magnitude of the acceleration greatest?

A projectile is fired from ground level with a speed of 150 m/s at an angle 30° above the horizontal on an airless planet where g = 10.0 m/s 2. What is the horizontal component of its velocity after 4.0 s? [Remember: The horizontal motion is a uniform motion.]

A certain object is being exerted an Fnet = 125 N. As a result, the object accelerates with an acceleration of 24.0 m/s2. The mass of the object is

For general projectile motion with no air resistance, the projectile’s acceleration in the vertical direction

Rank the following types of memories in terms of average memory access time:      Disk storage, Register, Main Memory, L1 Cache, L2 Cache        Fastest                                                                                                                                      Slowest 

Write a MIPS program that always checks the bit 0 of a memory data at address 0x0BF81234. If it is equal to one add nth  and (n+1)th elements of an array and store it to memory address 0x0BF85678 . Suppose $t0  contains the address of the 0th element of an array of 32-bit data and $t1 = n.  

In an attempt to improve cache performance, you try a new strategy. You think that because your L1 cache has a hit rate of 90%, you could improve the AMAT by randomly going straight to memory 10% of the time instead of first checking the L1 cache. Assuming the cache has a hit time of 5 cycles, and memory has an access time of 100 cycles, calculate the AMAT for this “improved” system.      Average Memory Access Time =                                                                               cycles  

Consider each of the following sets of instructions. Decide the minimum number of stalls needed in each case with and without forwarding. Assume the five stage MIPS pipeline discussed in class and that equality for branches are checked at the Decode stage. Assume delayed branching.  Number of stalls required?   Without forwarding With forwarding addiu $t1, $t0, 5 addu $t4, $t3, $t1 addu $t0, $t3, $t0     lw $t0, 4($s0) addu $t1, $t2, $t3 beq t0, t1, Done addu $t5, $t5, $s5       lw t1, 0($s0) sw t1, 0($s1)     addu $t0, $s0, $t1 lw $t1 8($t0)    

Represent the following decimal numbers in binary using 8-bit signed magnitude, one’s complement, two’s complement: −107